56778487694 has 16 divisors (see below), whose sum is σ = 88115180400. Its totient is φ = 27406997184.

The previous prime is 56778487687. The next prime is 56778487729. The reversal of 56778487694 is 49678487765.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 465629 + ... + 574775.

It is an arithmetic number, because the mean of its divisors is an integer number (5507198775).

Almost surely, 2^56778487694 is an apocalyptic number.

56778487694 is a deficient number, since it is larger than the sum of its proper divisors (31336692706).

56778487694 is a wasteful number, since it uses less digits than its factorization.

56778487694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118147.

The product of its digits is 568995840, while the sum is 71.

Adding to 56778487694 its sum of digits (71), we get a palindrome (56778487765).

The spelling of 56778487694 in words is "fifty-six billion, seven hundred seventy-eight million, four hundred eighty-seven thousand, six hundred ninety-four".