56778487764 has 24 divisors (see below), whose sum is σ = 135564142560. Its totient is φ = 18486019104.

The previous prime is 56778487763. The next prime is 56778487837. The reversal of 56778487764 is 46778487765.

It is a super-3 number, since 3×56778487764³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56778487763) 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 7 ways as a sum of consecutive naturals, for example, 55017399 + ... + 55018430.

It is an arithmetic number, because the mean of its divisors is an integer number (5648505940).

Almost surely, 2^56778487764 is an apocalyptic number.

It is an amenable number.

56778487764 is an abundant number, since it is smaller than the sum of its proper divisors (78785654796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56778487764 is a wasteful number, since it uses less digits than its factorization.

56778487764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110035879 (or 110035877 counting only the distinct ones).

The product of its digits is 442552320, while the sum is 69.

Subtracting from 56778487764 its reverse (46778487765), we obtain a palindrome (9999999999).

The spelling of 56778487764 in words is "fifty-six billion, seven hundred seventy-eight million, four hundred eighty-seven thousand, seven hundred sixty-four".