61653392538656 has 12 divisors (see below), whose sum is σ = 121380116560542. Its totient is φ = 30826696269312.

The previous prime is 61653392538643. The next prime is 61653392538697. The reversal of 61653392538656 is 65683529335616.

It can be written as a sum of positive squares in only one way, i.e., 31364704176400 + 30288688362256 = 5600420^2 + 5503516^2 .

It is a super-2 number, since 2×61653392538656² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 963334258385 + ... + 963334258448.

Almost surely, 2^{61653392538656} is an apocalyptic number.

It is an amenable number.

61653392538656 is a deficient number, since it is larger than the sum of its proper divisors (59726724021886).

61653392538656 is a wasteful number, since it uses less digits than its factorization.

61653392538656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926668516843 (or 1926668516835 counting only the distinct ones).

The product of its digits is 629856000, while the sum is 68.

The spelling of 61653392538656 in words is "sixty-one trillion, six hundred fifty-three billion, three hundred ninety-two million, five hundred thirty-eight thousand, six hundred fifty-six".