1516639025 has 24 divisors (see below), whose sum is σ = 2099326944. Its totient is φ = 1077350400.

The previous prime is 1516638979. The next prime is 1516639027. The reversal of 1516639025 is 5209366151.

It is not a de Polignac number, because 1516639025 - 2¹⁶ = 1516573489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1516639025.

It is not an unprimeable number, because it can be changed into a prime (1516639027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52304 + ... + 75953.

It is an arithmetic number, because the mean of its divisors is an integer number (87471956).

Almost surely, 2^1516639025 is an apocalyptic number.

It is an amenable number.

1516639025 is a deficient number, since it is larger than the sum of its proper divisors (582687919).

1516639025 is a wasteful number, since it uses less digits than its factorization.

1516639025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128321 (or 128316 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 1516639025 is about 38944.0499306377. The cubic root of 1516639025 is about 1148.9313386749.

The spelling of 1516639025 in words is "one billion, five hundred sixteen million, six hundred thirty-nine thousand, twenty-five".