55661950 has 12 divisors (see below), whose sum is σ = 103531320. Its totient is φ = 22264760.

The previous prime is 55661939. The next prime is 55661981. The reversal of 55661950 is 5916655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 556570 + ... + 556669.

It is an arithmetic number, because the mean of its divisors is an integer number (8627610).

Almost surely, 2^55661950 is an apocalyptic number.

55661950 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55661950 is a deficient number, since it is larger than the sum of its proper divisors (47869370).

55661950 is a wasteful number, since it uses less digits than its factorization.

55661950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113251 (or 1113246 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 37.

The square root of 55661950 is about 7460.6936674816. The cubic root of 55661950 is about 381.8148413265.

The spelling of 55661950 in words is "fifty-five million, six hundred sixty-one thousand, nine hundred fifty".