61333641 has 6 divisors (see below), whose sum is σ = 88593050. Its totient is φ = 40889088.

The previous prime is 61333621. The next prime is 61333669. The reversal of 61333641 is 14633316.

61333641 is a `hidden beast` number, since 6 + 13 + 3 + 3 + 641 = 666.

61333641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 56025225 + 5308416 = 7485^2 + 2304^2 .

It is not a de Polignac number, because 61333641 - 2¹³ = 61325449 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61333621) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 3407416 + ... + 3407433.

Almost surely, 2^61333641 is an apocalyptic number.

It is an amenable number.

61333641 is a deficient number, since it is larger than the sum of its proper divisors (27259409).

61333641 is a wasteful number, since it uses less digits than its factorization.

61333641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6814855 (or 6814852 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 61333641 is about 7831.5797257003. The cubic root of 61333641 is about 394.3661060646.

Adding to 61333641 its reverse (14633316), we get a palindrome (75966957).

The spelling of 61333641 in words is "sixty-one million, three hundred thirty-three thousand, six hundred forty-one".