56156603666133 has 24 divisors (see below), whose sum is σ = 77547874388608. Its totient is φ = 36146099501568.

The previous prime is 56156603666129. The next prime is 56156603666243. The reversal of 56156603666133 is 33166630665165.

It is not a de Polignac number, because 56156603666133 - 2² = 56156603666129 is a prime.

It is a super-2 number, since 2×56156603666133² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56156603666333) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 157501860 + ... + 157858002.

Almost surely, 2^{56156603666133} is an apocalyptic number.

It is an amenable number.

56156603666133 is a deficient number, since it is larger than the sum of its proper divisors (21391270722475).

56156603666133 is a wasteful number, since it uses less digits than its factorization.

56156603666133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418701 (or 418672 counting only the distinct ones).

The product of its (nonzero) digits is 31492800, while the sum is 57.

The spelling of 56156603666133 in words is "fifty-six trillion, one hundred fifty-six billion, six hundred three million, six hundred sixty-six thousand, one hundred thirty-three".