55775856840 has 64 divisors (see below), whose sum is σ = 182539172160. Its totient is φ = 13521419520.

The previous prime is 55775856833. The next prime is 55775856883. The reversal of 55775856840 is 4865857755.

It is a super-2 number, since 2×55775856840² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

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 15 ways as a sum of consecutive naturals, for example, 21125899 + ... + 21128538.

It is an arithmetic number, because the mean of its divisors is an integer number (2852174565).

Almost surely, 2^55775856840 is an apocalyptic number.

It is an amenable number.

55775856840 is an abundant number, since it is smaller than the sum of its proper divisors (126763315320).

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

55775856840 is a wasteful number, since it uses less digits than its factorization.

55775856840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42254462 (or 42254458 counting only the distinct ones).

The product of its (nonzero) digits is 47040000, while the sum is 60.

The spelling of 55775856840 in words is "fifty-five billion, seven hundred seventy-five million, eight hundred fifty-six thousand, eight hundred forty".