655915455 has 64 divisors (see below), whose sum is σ = 1269045120. Its totient is φ = 319500288.

The previous prime is 655915451. The next prime is 655915501. The reversal of 655915455 is 554519556.

655915455 is a `hidden beast` number, since 6 + 5 + 591 + 5 + 4 + 55 = 666.

It is not a de Polignac number, because 655915455 - 2² = 655915451 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 655915455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655915451) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 168309 + ... + 172161.

It is an arithmetic number, because the mean of its divisors is an integer number (19828830).

Almost surely, 2^655915455 is an apocalyptic number.

655915455 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

655915455 is a deficient number, since it is larger than the sum of its proper divisors (613129665).

655915455 is a wasteful number, since it uses less digits than its factorization.

655915455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3977 (or 3971 counting only the distinct ones).

The product of its digits is 675000, while the sum is 45.

The square root of 655915455 is about 25610.8464327128. The cubic root of 655915455 is about 868.8589678887.

The spelling of 655915455 in words is "six hundred fifty-five million, nine hundred fifteen thousand, four hundred fifty-five".