15403139136 has 672 divisors, whose sum is σ = 60253839360. Its totient is φ = 3638476800.

The previous prime is 15403139117. The next prime is 15403139137. The reversal of 15403139136 is 63193130451.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (672).

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

It is a self number, because there is not a number n which added to its sum of digits gives 15403139136.

It is not an unprimeable number, because it can be changed into a prime (15403139137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 23373175 + ... + 23373833.

Almost surely, 2^15403139136 is an apocalyptic number.

15403139136 is a gapful number since it is divisible by the number (16) 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 15403139136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30126919680).

15403139136 is an abundant number, since it is smaller than the sum of its proper divisors (44850700224).

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

15403139136 is a wasteful number, since it uses less digits than its factorization.

15403139136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743 (or 730 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

Adding to 15403139136 its reverse (63193130451), we get a palindrome (78596269587).

The spelling of 15403139136 in words is "fifteen billion, four hundred three million, one hundred thirty-nine thousand, one hundred thirty-six".