55777172502 has 64 divisors (see below), whose sum is σ = 119391770880. Its totient is φ = 17321342976.

The previous prime is 55777172491. The next prime is 55777172519. The reversal of 55777172502 is 20527177755.

It is a happy number.

It is a super-2 number, since 2×55777172502² (a number of 22 digits) 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 (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1654438 + ... + 1687814.

It is an arithmetic number, because the mean of its divisors is an integer number (1865496420).

Almost surely, 2^55777172502 is an apocalyptic number.

55777172502 is an abundant number, since it is smaller than the sum of its proper divisors (63614598378).

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

55777172502 is a wasteful number, since it uses less digits than its factorization.

55777172502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33645.

The product of its (nonzero) digits is 1200500, while the sum is 48.

The spelling of 55777172502 in words is "fifty-five billion, seven hundred seventy-seven million, one hundred seventy-two thousand, five hundred two".