55779936 has 24 divisors (see below), whose sum is σ = 146422584. Its totient is φ = 18593280.

The previous prime is 55779923. The next prime is 55779989. The reversal of 55779936 is 63997755.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×55779936² = 6222802520328192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290425 + ... + 290616.

It is an arithmetic number, because the mean of its divisors is an integer number (6100941).

Almost surely, 2^55779936 is an apocalyptic number.

It is an amenable number.

55779936 is an abundant number, since it is smaller than the sum of its proper divisors (90642648).

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

55779936 is a wasteful number, since it uses less digits than its factorization.

55779936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581054 (or 581046 counting only the distinct ones).

The product of its digits is 1786050, while the sum is 51.

The square root of 55779936 is about 7468.5966553296. The cubic root of 55779936 is about 382.0844271237.

The spelling of 55779936 in words is "fifty-five million, seven hundred seventy-nine thousand, nine hundred thirty-six".