56780155554 has 16 divisors (see below), whose sum is σ = 113563386720. Its totient is φ = 18926205920.

The previous prime is 56780155543. The next prime is 56780155559. The reversal of 56780155554 is 45555108765.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 56780155497 and 56780155506.

It is not an unprimeable number, because it can be changed into a prime (56780155559) 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 7 ways as a sum of consecutive naturals, for example, 162589 + ... + 374159.

It is an arithmetic number, because the mean of its divisors is an integer number (7097711670).

Almost surely, 2^56780155554 is an apocalyptic number.

56780155554 is an abundant number, since it is smaller than the sum of its proper divisors (56783231166).

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

56780155554 is a wasteful number, since it uses less digits than its factorization.

56780155554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256305.

The product of its (nonzero) digits is 4200000, while the sum is 51.

The spelling of 56780155554 in words is "fifty-six billion, seven hundred eighty million, one hundred fifty-five thousand, five hundred fifty-four".