1516821936 has 40 divisors (see below), whose sum is σ = 4478237184. Its totient is φ = 433377600.

The previous prime is 1516821931. The next prime is 1516821989. The reversal of 1516821936 is 6391286151.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1516821931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2256840 + ... + 2257511.

Almost surely, 2^1516821936 is an apocalyptic number.

1516821936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1516821936 is an abundant number, since it is smaller than the sum of its proper divisors (2961415248).

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

1516821936 is a wasteful number, since it uses less digits than its factorization.

1516821936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4514369 (or 4514363 counting only the distinct ones).

The product of its digits is 77760, while the sum is 42.

The square root of 1516821936 is about 38946.3982416860. The cubic root of 1516821936 is about 1148.9775249523.

The spelling of 1516821936 in words is "one billion, five hundred sixteen million, eight hundred twenty-one thousand, nine hundred thirty-six".