55375650 has 180 divisors, whose sum is σ = 170617986. Its totient is φ = 13305600.

The previous prime is 55375631. The next prime is 55375657. The reversal of 55375650 is 5657355.

55375650 is a `hidden beast` number, since 553 + 7 + 56 + 50 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 23532201 + 31843449 = 4851^2 + 5643^2 .

It is a super-2 number, since 2×55375650² = 6132925225845000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55375657) by changing a digit.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 489994 + ... + 490106.

Almost surely, 2^55375650 is an apocalyptic number.

55375650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55375650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85308993).

55375650 is an abundant number, since it is smaller than the sum of its proper divisors (115242336).

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

55375650 is a wasteful number, since it uses less digits than its factorization.

55375650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 78750, while the sum is 36.

The square root of 55375650 is about 7441.4817072946. The cubic root of 55375650 is about 381.1590878814.

The spelling of 55375650 in words is "fifty-five million, three hundred seventy-five thousand, six hundred fifty".