656511051000 has 128 divisors (see below), whose sum is σ = 2340930908160. Its totient is φ = 150059664000.

The previous prime is 656511050999. The next prime is 656511051029. The reversal of 656511051000 is 150115656.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15610216 + ... + 15652215.

It is an arithmetic number, because the mean of its divisors is an integer number (18288522720).

Almost surely, 2^656511051000 is an apocalyptic number.

656511051000 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

656511051000 is an abundant number, since it is smaller than the sum of its proper divisors (1684419857160).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

656511051000 is a wasteful number, since it uses less digits than its factorization.

656511051000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31262462 (or 31262448 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 30.

Adding to 656511051000 its reverse (150115656), we get a palindrome (656661166656).

The spelling of 656511051000 in words is "six hundred fifty-six billion, five hundred eleven million, fifty-one thousand".