15481631028 has 12 divisors (see below), whose sum is σ = 36123805760. Its totient is φ = 5160543672.

The previous prime is 15481631023. The next prime is 15481631041. The reversal of 15481631028 is 82013618451.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15481631023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 645067948 + ... + 645067971.

Almost surely, 2^15481631028 is an apocalyptic number.

It is an amenable number.

15481631028 is an abundant number, since it is smaller than the sum of its proper divisors (20642174732).

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

15481631028 is a wasteful number, since it uses less digits than its factorization.

15481631028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290135926 (or 1290135924 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The spelling of 15481631028 in words is "fifteen billion, four hundred eighty-one million, six hundred thirty-one thousand, twenty-eight".