616663512 has 48 divisors (see below), whose sum is σ = 1671663240. Its totient is φ = 205365888.

The previous prime is 616663507. The next prime is 616663519. The reversal of 616663512 is 215366616.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616663519) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90828 + ... + 97380.

Almost surely, 2^616663512 is an apocalyptic number.

It is an amenable number.

616663512 is an abundant number, since it is smaller than the sum of its proper divisors (1054999728).

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

616663512 is a wasteful number, since it uses less digits than its factorization.

616663512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7872 (or 7865 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 616663512 is about 24832.7105246286. The cubic root of 616663512 is about 851.1695604740.

It can be divided in two parts, 616 and 663512, that added together give a triangular number (664128 = T₁₁₅₂).

The spelling of 616663512 in words is "six hundred sixteen million, six hundred sixty-three thousand, five hundred twelve".