615616655 has 16 divisors (see below), whose sum is σ = 746845920. Its totient is φ = 487108608.

The previous prime is 615616633. The next prime is 615616741. The reversal of 615616655 is 556616516.

It is a cyclic number.

It is not a de Polignac number, because 615616655 - 2¹⁶ = 615551119 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 379436 + ... + 381054.

It is an arithmetic number, because the mean of its divisors is an integer number (46677870).

Almost surely, 2^615616655 is an apocalyptic number.

615616655 is a deficient number, since it is larger than the sum of its proper divisors (131229265).

615616655 is a wasteful number, since it uses less digits than its factorization.

615616655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2410.

The product of its digits is 162000, while the sum is 41.

The square root of 615616655 is about 24811.6233850186. The cubic root of 615616655 is about 850.6876350302.

The spelling of 615616655 in words is "six hundred fifteen million, six hundred sixteen thousand, six hundred fifty-five".