616616780 has 36 divisors (see below), whose sum is σ = 1402172352. Its totient is φ = 227672640.

The previous prime is 616616779. The next prime is 616616783. The reversal of 616616780 is 87616616.

It is not an unprimeable number, because it can be changed into a prime (616616783) 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, 87836 + ... + 94595.

It is an arithmetic number, because the mean of its divisors is an integer number (38949232).

Almost surely, 2^616616780 is an apocalyptic number.

It is an amenable number.

616616780 is an abundant number, since it is smaller than the sum of its proper divisors (785555572).

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

616616780 is a wasteful number, since it uses less digits than its factorization.

616616780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182466 (or 182451 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 616616780 is about 24831.7695704515. The cubic root of 616616780 is about 851.1480588176.

The spelling of 616616780 in words is "six hundred sixteen million, six hundred sixteen thousand, seven hundred eighty".