656565951016 has 8 divisors (see below), whose sum is σ = 1231061158170. Its totient is φ = 328282975504.

The previous prime is 656565951001. The next prime is 656565951103. The reversal of 656565951016 is 610159565656.

It can be written as a sum of positive squares in only one way, i.e., 580726298916 + 75839652100 = 762054^2 + 275390^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×656565951016² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41035371931 + ... + 41035371946.

Almost surely, 2^656565951016 is an apocalyptic number.

It is an amenable number.

656565951016 is a deficient number, since it is larger than the sum of its proper divisors (574495207154).

656565951016 is a wasteful number, since it uses less digits than its factorization.

656565951016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82070743883 (or 82070743879 counting only the distinct ones).

The product of its (nonzero) digits is 7290000, while the sum is 55.

The spelling of 656565951016 in words is "six hundred fifty-six billion, five hundred sixty-five million, nine hundred fifty-one thousand, sixteen".