616576388 has 6 divisors (see below), whose sum is σ = 1079008686. Its totient is φ = 308288192.

The previous prime is 616576381. The next prime is 616576427. The reversal of 616576388 is 883675616.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 486114304 + 130462084 = 22048^2 + 11422^2 .

It is not an unprimeable number, because it can be changed into a prime (616576381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77072045 + ... + 77072052.

It is an arithmetic number, because the mean of its divisors is an integer number (179834781).

Almost surely, 2^616576388 is an apocalyptic number.

It is an amenable number.

616576388 is a deficient number, since it is larger than the sum of its proper divisors (462432298).

616576388 is a wasteful number, since it uses less digits than its factorization.

616576388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154144101 (or 154144099 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 50.

The square root of 616576388 is about 24830.9562441723. The cubic root of 616576388 is about 851.1294733557.

The spelling of 616576388 in words is "six hundred sixteen million, five hundred seventy-six thousand, three hundred eighty-eight".