56401772773 has 4 divisors (see below), whose sum is σ = 57081312288. Its totient is φ = 55722233260.

The previous prime is 56401772761. The next prime is 56401772849. The reversal of 56401772773 is 37727710465.

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 a de Polignac number, because none of the positive numbers 2^k-56401772773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56401772173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339769633 + ... + 339769798.

It is an arithmetic number, because the mean of its divisors is an integer number (14270328072).

Almost surely, 2^56401772773 is an apocalyptic number.

It is an amenable number.

56401772773 is a deficient number, since it is larger than the sum of its proper divisors (679539515).

56401772773 is an equidigital number, since it uses as much as digits as its factorization.

56401772773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679539514.

The product of its (nonzero) digits is 1728720, while the sum is 49.

The spelling of 56401772773 in words is "fifty-six billion, four hundred one million, seven hundred seventy-two thousand, seven hundred seventy-three".