61641510 has 96 divisors (see below), whose sum is σ = 181232640. Its totient is φ = 13341888.

The previous prime is 61641499. The next prime is 61641521. The reversal of 61641510 is 1514616.

61641510 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61641499) and next prime (61641521).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26827 + ... + 29033.

It is an arithmetic number, because the mean of its divisors is an integer number (1887840).

Almost surely, 2^61641510 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61641510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90616320).

61641510 is an abundant number, since it is smaller than the sum of its proper divisors (119591130).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61641510 is a wasteful number, since it uses less digits than its factorization.

61641510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2250 (or 2243 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 61641510 is about 7851.2107346574. The cubic root of 61641510 is about 395.0248555635.

The spelling of 61641510 in words is "sixty-one million, six hundred forty-one thousand, five hundred ten".