61510560656 has 20 divisors (see below), whose sum is σ = 119194465932. Its totient is φ = 30750698496.

The previous prime is 61510560649. The next prime is 61510560659. The reversal of 61510560656 is 65606501516.

It can be written as a sum of positive squares in 2 ways, for example, as 37179552400 + 24331008256 = 192820^2 + 155984^2 .

It is not an unprimeable number, because it can be changed into a prime (61510560659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174281 + ... + 391656.

Almost surely, 2^61510560656 is an apocalyptic number.

It is an amenable number.

61510560656 is a deficient number, since it is larger than the sum of its proper divisors (57683905276).

61510560656 is a wasteful number, since it uses less digits than its factorization.

61510560656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572738 (or 572732 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 61510560656 in words is "sixty-one billion, five hundred ten million, five hundred sixty thousand, six hundred fifty-six".