56787601393 has 4 divisors (see below), whose sum is σ = 57425664420. Its totient is φ = 56149538368.

The previous prime is 56787601361. The next prime is 56787601463. The reversal of 56787601393 is 39310678765.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11306494224 + 45481107169 = 106332^2 + 213263^2 .

It is a cyclic number.

It is not a de Polignac number, because 56787601393 - 2⁵ = 56787601361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56787601093) 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, 319031380 + ... + 319031557.

It is an arithmetic number, because the mean of its divisors is an integer number (14356416105).

Almost surely, 2^56787601393 is an apocalyptic number.

It is an amenable number.

56787601393 is a deficient number, since it is larger than the sum of its proper divisors (638063027).

56787601393 is an equidigital number, since it uses as much as digits as its factorization.

56787601393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638063026.

The product of its (nonzero) digits is 5715360, while the sum is 55.

The spelling of 56787601393 in words is "fifty-six billion, seven hundred eighty-seven million, six hundred one thousand, three hundred ninety-three".