56121664701481 has 4 divisors (see below), whose sum is σ = 56912110683264. Its totient is φ = 55331218719700.

The previous prime is 56121664701433. The next prime is 56121664701491. The reversal of 56121664701481 is 18410746612165.

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 56121664701481 - 2²⁹ = 56121127830569 is a prime.

It is a super-2 number, since 2×56121664701481² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56121664701491) 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, 395222990785 + ... + 395222990926.

It is an arithmetic number, because the mean of its divisors is an integer number (14228027670816).

Almost surely, 2^{56121664701481} is an apocalyptic number.

It is an amenable number.

56121664701481 is a deficient number, since it is larger than the sum of its proper divisors (790445981783).

56121664701481 is an equidigital number, since it uses as much as digits as its factorization.

56121664701481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790445981782.

The product of its (nonzero) digits is 1935360, while the sum is 52.

The spelling of 56121664701481 in words is "fifty-six trillion, one hundred twenty-one billion, six hundred sixty-four million, seven hundred one thousand, four hundred eighty-one".