55770516 has 36 divisors (see below), whose sum is σ = 141628032. Its totient is φ = 18504144.

The previous prime is 55770497. The next prime is 55770563. The reversal of 55770516 is 61507755.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×55770516² = 6220700909812512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4555 + ... + 11501.

It is an arithmetic number, because the mean of its divisors is an integer number (3934112).

Almost surely, 2^55770516 is an apocalyptic number.

It is an amenable number.

55770516 is an abundant number, since it is smaller than the sum of its proper divisors (85857516).

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

55770516 is a wasteful number, since it uses less digits than its factorization.

55770516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7180 (or 7175 counting only the distinct ones).

The product of its (nonzero) digits is 36750, while the sum is 36.

The square root of 55770516 is about 7467.9659881389. The cubic root of 55770516 is about 382.0629173707.

The spelling of 55770516 in words is "fifty-five million, seven hundred seventy thousand, five hundred sixteen".