55778150 has 24 divisors (see below), whose sum is σ = 104457600. Its totient is φ = 22158560.

The previous prime is 55778119. The next prime is 55778231. The reversal of 55778150 is 5187755.

It is a super-2 number, since 2×55778150² = 6222404034845000, 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 11 ways as a sum of consecutive naturals, for example, 3707 + ... + 11193.

It is an arithmetic number, because the mean of its divisors is an integer number (4352400).

Almost surely, 2^55778150 is an apocalyptic number.

55778150 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55778150 is a deficient number, since it is larger than the sum of its proper divisors (48679450).

55778150 is a wasteful number, since it uses less digits than its factorization.

55778150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7648 (or 7643 counting only the distinct ones).

The product of its (nonzero) digits is 49000, while the sum is 38.

The square root of 55778150 is about 7468.4770870640. The cubic root of 55778150 is about 382.0803491336.

The spelling of 55778150 in words is "fifty-five million, seven hundred seventy-eight thousand, one hundred fifty".