61578650468 has 12 divisors (see below), whose sum is σ = 107884686000. Its totient is φ = 30754454472.

The previous prime is 61578650447. The next prime is 61578650479. The reversal of 61578650468 is 86405687516.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8713718 + ... + 8720781.

It is an arithmetic number, because the mean of its divisors is an integer number (8990390500).

Almost surely, 2^61578650468 is an apocalyptic number.

It is an amenable number.

61578650468 is a deficient number, since it is larger than the sum of its proper divisors (46306035532).

61578650468 is a wasteful number, since it uses less digits than its factorization.

61578650468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17435386 (or 17435384 counting only the distinct ones).

The product of its (nonzero) digits is 9676800, while the sum is 56.

The spelling of 61578650468 in words is "sixty-one billion, five hundred seventy-eight million, six hundred fifty thousand, four hundred sixty-eight".