15002520138 has 96 divisors (see below), whose sum is σ = 34328810880. Its totient is φ = 4909766400.

The previous prime is 15002520107. The next prime is 15002520167. The reversal of 15002520138 is 83102520051.

It is a happy number.

15002520138 is a `hidden beast` number, since 1 + 5 + 0 + 0 + 2 + 520 + 138 = 666.

15002520138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×15002520138² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6530206 + ... + 6532502.

It is an arithmetic number, because the mean of its divisors is an integer number (357591780).

Almost surely, 2^15002520138 is an apocalyptic number.

15002520138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15002520138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17164405440).

15002520138 is an abundant number, since it is smaller than the sum of its proper divisors (19326290742).

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

15002520138 is a wasteful number, since it uses less digits than its factorization.

15002520138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2554 (or 2542 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The spelling of 15002520138 in words is "fifteen billion, two million, five hundred twenty thousand, one hundred thirty-eight".