616441988 has 6 divisors (see below), whose sum is σ = 1078773486. Its totient is φ = 308220992.

The previous prime is 616441963. The next prime is 616441997. The reversal of 616441988 is 889144616.

It can be written as a sum of positive squares in only one way, i.e., 338486404 + 277955584 = 18398^2 + 16672^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77055245 + ... + 77055252.

It is an arithmetic number, because the mean of its divisors is an integer number (179795581).

Almost surely, 2^616441988 is an apocalyptic number.

It is an amenable number.

616441988 is a deficient number, since it is larger than the sum of its proper divisors (462331498).

616441988 is a wasteful number, since it uses less digits than its factorization.

616441988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154110501 (or 154110499 counting only the distinct ones).

The product of its digits is 331776, while the sum is 47.

The square root of 616441988 is about 24828.2497973578. The cubic root of 616441988 is about 851.0676264021.

The spelling of 616441988 in words is "six hundred sixteen million, four hundred forty-one thousand, nine hundred eighty-eight".