64890552 has 32 divisors (see below), whose sum is σ = 162424080. Its totient is φ = 21603840.

The previous prime is 64890509. The next prime is 64890557. The reversal of 64890552 is 25509846.

It is a self number, because there is not a number n which added to its sum of digits gives 64890552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64890557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36402 + ... + 38142.

Almost surely, 2^64890552 is an apocalyptic number.

It is an amenable number.

64890552 is an abundant number, since it is smaller than the sum of its proper divisors (97533528).

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

64890552 is a wasteful number, since it uses less digits than its factorization.

64890552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3303 (or 3299 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 64890552 is about 8055.4672117761. The cubic root of 64890552 is about 401.8467770806.

The spelling of 64890552 in words is "sixty-four million, eight hundred ninety thousand, five hundred fifty-two".