61681382 has 16 divisors (see below), whose sum is σ = 109151232. Its totient is φ = 25581960.

The previous prime is 61681369. The next prime is 61681387. The reversal of 61681382 is 28318616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61681387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70628 + ... + 71495.

It is an arithmetic number, because the mean of its divisors is an integer number (6821952).

Almost surely, 2^61681382 is an apocalyptic number.

61681382 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

61681382 is a deficient number, since it is larger than the sum of its proper divisors (47469850).

61681382 is a wasteful number, since it uses less digits than its factorization.

61681382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142163.

The product of its digits is 13824, while the sum is 35.

The square root of 61681382 is about 7853.7495503740. The cubic root of 61681382 is about 395.1100094167.

Adding to 61681382 its reverse (28318616), we get a palindrome (89999998).

The spelling of 61681382 in words is "sixty-one million, six hundred eighty-one thousand, three hundred eighty-two".