615216606660 has 72 divisors (see below), whose sum is σ = 1872894221016. Its totient is φ = 163465482240.

The previous prime is 615216606643. The next prime is 615216606661. The reversal of 615216606660 is 66606612516.

It can be written as a sum of positive squares in 4 ways, for example, as 397523844 + 614819082816 = 19938^2 + 784104^2 .

It is a super-2 number, since 2×615216606660² (a number of 24 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (615216606661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6119581 + ... + 6219300.

Almost surely, 2^615216606660 is an apocalyptic number.

615216606660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

615216606660 is an abundant number, since it is smaller than the sum of its proper divisors (1257677614356).

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

615216606660 is a wasteful number, since it uses less digits than its factorization.

615216606660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12339173 (or 12339168 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 615216606660 in words is "six hundred fifteen billion, two hundred sixteen million, six hundred six thousand, six hundred sixty".