55780172 has 24 divisors (see below), whose sum is σ = 114283680. Its totient is φ = 23322240.

The previous prime is 55780163. The next prime is 55780183. The reversal of 55780172 is 27108755.

It is a super-2 number, since 2×55780172² = 6222855176699168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23147 + ... + 25442.

It is an arithmetic number, because the mean of its divisors is an integer number (4761820).

Almost surely, 2^55780172 is an apocalyptic number.

It is an amenable number.

55780172 is an abundant number, since it is smaller than the sum of its proper divisors (58503508).

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

55780172 is a wasteful number, since it uses less digits than its factorization.

55780172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48641 (or 48639 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 55780172 is about 7468.6124548004. The cubic root of 55780172 is about 382.0849659781.

The spelling of 55780172 in words is "fifty-five million, seven hundred eighty thousand, one hundred seventy-two".