61604680635 has 24 divisors (see below), whose sum is σ = 106794389520. Its totient is φ = 32851847232.

The previous prime is 61604680589. The next prime is 61604680637. The reversal of 61604680635 is 53608640616.

61604680635 is a `hidden beast` number, since 6 + 1 + 6 + 0 + 4 + 6 + 8 + 0 + 635 = 666.

It is not a de Polignac number, because 61604680635 - 2¹⁹ = 61604156347 is a prime.

It is a super-2 number, since 2×61604680635² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (61604680637) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 313201 + ... + 470429.

It is an arithmetic number, because the mean of its divisors is an integer number (4449766230).

Almost surely, 2^61604680635 is an apocalyptic number.

61604680635 is a deficient number, since it is larger than the sum of its proper divisors (45189708885).

61604680635 is a wasteful number, since it uses less digits than its factorization.

61604680635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165947 (or 165944 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 61604680635 in words is "sixty-one billion, six hundred four million, six hundred eighty thousand, six hundred thirty-five".