15876779490 has 512 divisors, whose sum is σ = 51987640320. Its totient is φ = 3396556800.

The previous prime is 15876779441. The next prime is 15876779491. The reversal of 15876779490 is 9497767851.

15876779490 is a `hidden beast` number, since 1 + 5 + 8 + 76 + 7 + 79 + 490 = 666.

It is not an unprimeable number, because it can be changed into a prime (15876779491) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 121196725 + ... + 121196855.

It is an arithmetic number, because the mean of its divisors is an integer number (101538360).

Almost surely, 2^15876779490 is an apocalyptic number.

15876779490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15876779490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25993820160).

15876779490 is an abundant number, since it is smaller than the sum of its proper divisors (36110860830).

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

15876779490 is a wasteful number, since it uses less digits than its factorization.

15876779490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 281 counting only the distinct ones).

The product of its (nonzero) digits is 26671680, while the sum is 63.

The spelling of 15876779490 in words is "fifteen billion, eight hundred seventy-six million, seven hundred seventy-nine thousand, four hundred ninety".