15400404013232 has 160 divisors (see below), whose sum is σ = 36081378643968. Its totient is φ = 6225175427328.

The previous prime is 15400404013229. The next prime is 15400404013273. The reversal of 15400404013232 is 23231040400451.

It is a junction number, because it is equal to n+sod(n) for n = 15400404013195 and 15400404013204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111752723 + ... + 111890445.

Almost surely, 2^{15400404013232} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15400404013232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18040689321984).

15400404013232 is an abundant number, since it is smaller than the sum of its proper divisors (20680974630736).

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

15400404013232 is a wasteful number, since it uses less digits than its factorization.

15400404013232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138367 (or 138361 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 15400404013232 its reverse (23231040400451), we get a palindrome (38631444413683).

The spelling of 15400404013232 in words is "fifteen trillion, four hundred billion, four hundred four million, thirteen thousand, two hundred thirty-two".