615551655 has 64 divisors (see below), whose sum is σ = 1056706560. Its totient is φ = 305433600.

The previous prime is 615551653. The next prime is 615551689. The reversal of 615551655 is 556155516.

It is not a de Polignac number, because 615551655 - 2¹ = 615551653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (615551653) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 1582201 + ... + 1582589.

It is an arithmetic number, because the mean of its divisors is an integer number (16511040).

Almost surely, 2^615551655 is an apocalyptic number.

615551655 is a deficient number, since it is larger than the sum of its proper divisors (441154905).

615551655 is a wasteful number, since it uses less digits than its factorization.

615551655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552.

The product of its digits is 112500, while the sum is 39.

The square root of 615551655 is about 24810.3134804863. The cubic root of 615551655 is about 850.6576939719.

The spelling of 615551655 in words is "six hundred fifteen million, five hundred fifty-one thousand, six hundred fifty-five".