1516638372 has 12 divisors (see below), whose sum is σ = 3538822896. Its totient is φ = 505546120.

The previous prime is 1516638371. The next prime is 1516638397. The reversal of 1516638372 is 2738366151.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1516638371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63193254 + ... + 63193277.

It is an arithmetic number, because the mean of its divisors is an integer number (294901908).

Almost surely, 2^1516638372 is an apocalyptic number.

1516638372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1516638372 is an abundant number, since it is smaller than the sum of its proper divisors (2022184524).

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

1516638372 is a wasteful number, since it uses less digits than its factorization.

1516638372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126386538 (or 126386536 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 1516638372 is about 38944.0415468143. The cubic root of 1516638372 is about 1148.9311737813.

The spelling of 1516638372 in words is "one billion, five hundred sixteen million, six hundred thirty-eight thousand, three hundred seventy-two".