615961872 has 60 divisors (see below), whose sum is σ = 1729179504. Its totient is φ = 204684480.

The previous prime is 615961859. The next prime is 615961897. The reversal of 615961872 is 278169516.

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 11 ways as a sum of consecutive naturals, for example, 41203 + ... + 54125.

Almost surely, 2^615961872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 615961872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (864589752).

615961872 is an abundant number, since it is smaller than the sum of its proper divisors (1113217632).

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

615961872 is a wasteful number, since it uses less digits than its factorization.

615961872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13268 (or 13259 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 615961872 is about 24818.5791696463. The cubic root of 615961872 is about 850.8466176017.

The spelling of 615961872 in words is "six hundred fifteen million, nine hundred sixty-one thousand, eight hundred seventy-two".