15271878402 has 64 divisors (see below), whose sum is σ = 37098846720. Its totient is φ = 4618328400.

The previous prime is 15271878373. The next prime is 15271878403. The reversal of 15271878402 is 20487817251.

15271878402 is a `hidden beast` number, since 1 + 527 + 1 + 87 + 8 + 40 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (15271878403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 265473 + ... + 317835.

It is an arithmetic number, because the mean of its divisors is an integer number (579669480).

Almost surely, 2^15271878402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15271878402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18549423360).

15271878402 is an abundant number, since it is smaller than the sum of its proper divisors (21826968318).

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

15271878402 is a wasteful number, since it uses less digits than its factorization.

15271878402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52876 (or 52870 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The spelling of 15271878402 in words is "fifteen billion, two hundred seventy-one million, eight hundred seventy-eight thousand, four hundred two".