656055251578 has 32 divisors (see below), whose sum is σ = 1039821960960. Its totient is φ = 309934376640.

The previous prime is 656055251567. The next prime is 656055251587. The reversal of 656055251578 is 875152550656.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28156113 + ... + 28179403.

It is an arithmetic number, because the mean of its divisors is an integer number (32494436280).

Almost surely, 2^656055251578 is an apocalyptic number.

656055251578 is a deficient number, since it is larger than the sum of its proper divisors (383766709382).

656055251578 is a wasteful number, since it uses less digits than its factorization.

656055251578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33702.

The product of its (nonzero) digits is 12600000, while the sum is 55.

The spelling of 656055251578 in words is "six hundred fifty-six billion, fifty-five million, two hundred fifty-one thousand, five hundred seventy-eight".