55771764 has 48 divisors (see below), whose sum is σ = 145051200. Its totient is φ = 16574976.

The previous prime is 55771753. The next prime is 55771801. The reversal of 55771764 is 46717755.

It is a super-2 number, since 2×55771764² = 6220979319343392, which 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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3319 + ... + 11070.

It is an arithmetic number, because the mean of its divisors is an integer number (3021900).

Almost surely, 2^55771764 is an apocalyptic number.

It is an amenable number.

55771764 is an abundant number, since it is smaller than the sum of its proper divisors (89279436).

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

55771764 is a wasteful number, since it uses less digits than its factorization.

55771764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14432 (or 14430 counting only the distinct ones).

The product of its digits is 205800, while the sum is 42.

The square root of 55771764 is about 7468.0495445598. The cubic root of 55771764 is about 382.0657672096.

The spelling of 55771764 in words is "fifty-five million, seven hundred seventy-one thousand, seven hundred sixty-four".