616139625 has 16 divisors (see below), whose sum is σ = 1025256960. Its totient is φ = 328607600.

The previous prime is 616139609. The next prime is 616139669. The reversal of 616139625 is 526931616.

616139625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 616139625 - 2⁴ = 616139609 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 821145 + ... + 821894.

It is an arithmetic number, because the mean of its divisors is an integer number (64078560).

Almost surely, 2^616139625 is an apocalyptic number.

It is an amenable number.

616139625 is a deficient number, since it is larger than the sum of its proper divisors (409117335).

616139625 is a wasteful number, since it uses less digits than its factorization.

616139625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1643057 (or 1643047 counting only the distinct ones).

The product of its digits is 58320, while the sum is 39.

The square root of 616139625 is about 24822.1599583920. The cubic root of 616139625 is about 850.9284549144.

The spelling of 616139625 in words is "six hundred sixteen million, one hundred thirty-nine thousand, six hundred twenty-five".