15812149781604 has 48 divisors (see below), whose sum is σ = 40250851131456. Its totient is φ = 4791353088000.

The previous prime is 15812149781581. The next prime is 15812149781609. The reversal of 15812149781604 is 40618794121851.

It is not an unprimeable number, because it can be changed into a prime (15812149781609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480984 + ... + 5644080.

It is an arithmetic number, because the mean of its divisors is an integer number (838559398572).

Almost surely, 2^{15812149781604} is an apocalyptic number.

It is an amenable number.

15812149781604 is an abundant number, since it is smaller than the sum of its proper divisors (24438701349852).

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

15812149781604 is a wasteful number, since it uses less digits than its factorization.

15812149781604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5186316 (or 5186314 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 57.

The spelling of 15812149781604 in words is "fifteen trillion, eight hundred twelve billion, one hundred forty-nine million, seven hundred eighty-one thousand, six hundred four".