1516389864 has 32 divisors (see below), whose sum is σ = 4135609440. Its totient is φ = 459512000.

The previous prime is 1516389859. The next prime is 1516389869. The reversal of 1516389864 is 4689836151.

It is an interprime number because it is at equal distance from previous prime (1516389859) and next prime (1516389869).

It is not an unprimeable number, because it can be changed into a prime (1516389869) 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, 2871687 + ... + 2872214.

It is an arithmetic number, because the mean of its divisors is an integer number (129237795).

Almost surely, 2^1516389864 is an apocalyptic number.

It is an amenable number.

1516389864 is an abundant number, since it is smaller than the sum of its proper divisors (2619219576).

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

1516389864 is a wasteful number, since it uses less digits than its factorization.

1516389864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5743921 (or 5743917 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 51.

The square root of 1516389864 is about 38940.8508381622. The cubic root of 1516389864 is about 1148.8684178448.

The spelling of 1516389864 in words is "one billion, five hundred sixteen million, three hundred eighty-nine thousand, eight hundred sixty-four".