616621672 has 16 divisors (see below), whose sum is σ = 1175120100. Its totient is φ = 303256320.

The previous prime is 616621669. The next prime is 616621679. The reversal of 616621672 is 276126616.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 575328196 + 41293476 = 23986^2 + 6426^2 .

It is not an unprimeable number, because it can be changed into a prime (616621679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 631297 + ... + 632272.

Almost surely, 2^616621672 is an apocalyptic number.

It is an amenable number.

616621672 is a deficient number, since it is larger than the sum of its proper divisors (558498428).

616621672 is a wasteful number, since it uses less digits than its factorization.

616621672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263636 (or 1263632 counting only the distinct ones).

The product of its digits is 36288, while the sum is 37.

The square root of 616621672 is about 24831.8680731032. The cubic root of 616621672 is about 851.1503097053.

The spelling of 616621672 in words is "six hundred sixteen million, six hundred twenty-one thousand, six hundred seventy-two".