616385970 has 64 divisors (see below), whose sum is σ = 1715178240. Its totient is φ = 157221504.

The previous prime is 616385929. The next prime is 616386007. The reversal of 616385970 is 79583616.

It is a happy number.

616385970 is a `hidden beast` number, since 6 + 1 + 638 + 5 + 9 + 7 + 0 = 666.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43419 + ... + 55838.

It is an arithmetic number, because the mean of its divisors is an integer number (26799660).

Almost surely, 2^616385970 is an apocalyptic number.

616385970 is an abundant number, since it is smaller than the sum of its proper divisors (1098792270).

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

616385970 is a wasteful number, since it uses less digits than its factorization.

616385970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99296 (or 99290 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 616385970 is about 24827.1216616023. The cubic root of 616385970 is about 851.0418459007.

The spelling of 616385970 in words is "six hundred sixteen million, three hundred eighty-five thousand, nine hundred seventy".