15139535040 has 560 divisors, whose sum is σ = 62021703744. Its totient is φ = 3433881600.

The previous prime is 15139535023. The next prime is 15139535041. The reversal of 15139535040 is 4053593151.

It is a happy number.

15139535040 is a `hidden beast` number, since 1 + 51 + 39 + 535 + 0 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (560).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 15139534986 and 15139535004.

It is not an unprimeable number, because it can be changed into a prime (15139535041) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 32840410 + ... + 32840870.

Almost surely, 2^15139535040 is an apocalyptic number.

15139535040 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 15139535040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31010851872).

15139535040 is an abundant number, since it is smaller than the sum of its proper divisors (46882168704).

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

15139535040 is a wasteful number, since it uses less digits than its factorization.

15139535040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678 (or 659 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 36.

The spelling of 15139535040 in words is "fifteen billion, one hundred thirty-nine million, five hundred thirty-five thousand, forty".