16525991484 has 72 divisors (see below), whose sum is σ = 41937735840. Its totient is φ = 5487132672.

The previous prime is 16525991477. The next prime is 16525991491. The reversal of 16525991484 is 48419952561.

16525991484 is a `hidden beast` number, since 1 + 6 + 5 + 2 + 599 + 1 + 48 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (16525991477) and next prime (16525991491).

It is a self number, because there is not a number n which added to its sum of digits gives 16525991484.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18630889 + ... + 18631775.

Almost surely, 2^16525991484 is an apocalyptic number.

It is an amenable number.

16525991484 is an abundant number, since it is smaller than the sum of its proper divisors (25411744356).

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

16525991484 is a wasteful number, since it uses less digits than its factorization.

16525991484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2339 (or 2334 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The spelling of 16525991484 in words is "sixteen billion, five hundred twenty-five million, nine hundred ninety-one thousand, four hundred eighty-four".