55190664 has 96 divisors (see below), whose sum is σ = 156748800. Its totient is φ = 17521920.

The previous prime is 55190657. The next prime is 55190677. The reversal of 55190664 is 46609155.

It is a super-3 number, since 3×55190664³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 176172 + ... + 176484.

It is an arithmetic number, because the mean of its divisors is an integer number (1632800).

Almost surely, 2^55190664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55190664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78374400).

55190664 is an abundant number, since it is smaller than the sum of its proper divisors (101558136).

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

55190664 is a wasteful number, since it uses less digits than its factorization.

55190664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435 (or 428 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 55190664 is about 7429.0419301549. The cubic root of 55190664 is about 380.7341853927.

The spelling of 55190664 in words is "fifty-five million, one hundred ninety thousand, six hundred sixty-four".