513401031656 has 16 divisors (see below), whose sum is σ = 962654309700. Its totient is φ = 256693215744.

The previous prime is 513401031653. The next prime is 513401031673. The reversal of 513401031656 is 656130104315.

It can be written as a sum of positive squares in 2 ways, for example, as 395225968900 + 118175062756 = 628670^2 + 343766^2 .

It is a super-2 number, since 2×513401031656² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (513401031653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 607625 + ... + 1181528.

Almost surely, 2^513401031656 is an apocalyptic number.

It is an amenable number.

513401031656 is a deficient number, since it is larger than the sum of its proper divisors (449253278044).

513401031656 is a wasteful number, since it uses less digits than its factorization.

513401031656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1825028 (or 1825024 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 513401031656 in words is "five hundred thirteen billion, four hundred one million, thirty-one thousand, six hundred fifty-six".