56151841965121 has 4 divisors (see below), whose sum is σ = 64173533674432. Its totient is φ = 48130150255812.

The previous prime is 56151841965091. The next prime is 56151841965217. The reversal of 56151841965121 is 12156914815165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56151841965121 - 2¹⁵ = 56151841932353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56151841965221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4010845854645 + ... + 4010845854658.

It is an arithmetic number, because the mean of its divisors is an integer number (16043383418608).

Almost surely, 2^{56151841965121} is an apocalyptic number.

It is an amenable number.

56151841965121 is a deficient number, since it is larger than the sum of its proper divisors (8021691709311).

56151841965121 is an equidigital number, since it uses as much as digits as its factorization.

56151841965121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8021691709310.

The product of its digits is 2592000, while the sum is 55.

The spelling of 56151841965121 in words is "fifty-six trillion, one hundred fifty-one billion, eight hundred forty-one million, nine hundred sixty-five thousand, one hundred twenty-one".