1516872961 has 4 divisors (see below), whose sum is σ = 1596708400. Its totient is φ = 1437037524.

The previous prime is 1516872943. The next prime is 1516873003. The reversal of 1516872961 is 1692786151.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1516872961 - 2²³ = 1508484353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1516872901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39917691 + ... + 39917728.

It is an arithmetic number, because the mean of its divisors is an integer number (399177100).

Almost surely, 2^1516872961 is an apocalyptic number.

It is an amenable number.

1516872961 is a deficient number, since it is larger than the sum of its proper divisors (79835439).

1516872961 is an equidigital number, since it uses as much as digits as its factorization.

1516872961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79835438.

The product of its digits is 181440, while the sum is 46.

The square root of 1516872961 is about 38947.0533031704. The cubic root of 1516872961 is about 1148.9904084512.

The spelling of 1516872961 in words is "one billion, five hundred sixteen million, eight hundred seventy-two thousand, nine hundred sixty-one".