15013040640 has 480 divisors, whose sum is σ = 53377030080. Its totient is φ = 3596156928.

The previous prime is 15013040639. The next prime is 15013040737. The reversal of 15013040640 is 4604031051.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 15013040640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55810426 + ... + 55810694.

It is an arithmetic number, because the mean of its divisors is an integer number (111202146).

Almost surely, 2^15013040640 is an apocalyptic number.

15013040640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15013040640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26688515040).

15013040640 is an abundant number, since it is smaller than the sum of its proper divisors (38363989440).

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

15013040640 is a wasteful number, since it uses less digits than its factorization.

15013040640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 15013040640 its reverse (4604031051), we get a palindrome (19617071691).

The spelling of 15013040640 in words is "fifteen billion, thirteen million, forty thousand, six hundred forty".