655621464 has 64 divisors (see below), whose sum is σ = 1663706880. Its totient is φ = 215280000.

The previous prime is 655621457. The next prime is 655621469. The reversal of 655621464 is 464126556.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655621469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 474054 + ... + 475434.

It is an arithmetic number, because the mean of its divisors is an integer number (25995420).

Almost surely, 2^655621464 is an apocalyptic number.

It is an amenable number.

655621464 is an abundant number, since it is smaller than the sum of its proper divisors (1008085416).

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

655621464 is a wasteful number, since it uses less digits than its factorization.

655621464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672 (or 1668 counting only the distinct ones).

The product of its digits is 172800, while the sum is 39.

The square root of 655621464 is about 25605.1062095044. The cubic root of 655621464 is about 868.7291366796.

It can be divided in two parts, 655621 and 464, that added together give a triangular number (656085 = T₁₁₄₅).

The spelling of 655621464 in words is "six hundred fifty-five million, six hundred twenty-one thousand, four hundred sixty-four".