55780764 has 24 divisors (see below), whose sum is σ = 140167440. Its totient is φ = 17163264.

The previous prime is 55780741. The next prime is 55780771. The reversal of 55780764 is 46708755.

55780764 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55780764² = 6222987264847392, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178629 + ... + 178940.

It is an arithmetic number, because the mean of its divisors is an integer number (5840310).

Almost surely, 2^55780764 is an apocalyptic number.

It is an amenable number.

55780764 is an abundant number, since it is smaller than the sum of its proper divisors (84386676).

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

55780764 is a wasteful number, since it uses less digits than its factorization.

55780764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357589 (or 357587 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 42.

The square root of 55780764 is about 7468.6520872243. The cubic root of 55780764 is about 382.0863176741.

The spelling of 55780764 in words is "fifty-five million, seven hundred eighty thousand, seven hundred sixty-four".