15231504990 has 64 divisors (see below), whose sum is σ = 40725115200. Its totient is φ = 3620004864.

The previous prime is 15231504979. The next prime is 15231504991. The reversal of 15231504990 is 9940513251.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15231504991) 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, 662055 + ... + 684674.

It is an arithmetic number, because the mean of its divisors is an integer number (636329925).

Almost surely, 2^15231504990 is an apocalyptic number.

15231504990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15231504990 is an abundant number, since it is smaller than the sum of its proper divisors (25493610210).

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

15231504990 is a wasteful number, since it uses less digits than its factorization.

15231504990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346781.

The product of its (nonzero) digits is 48600, while the sum is 39.

The spelling of 15231504990 in words is "fifteen billion, two hundred thirty-one million, five hundred four thousand, nine hundred ninety".