15421532515452 has 72 divisors (see below), whose sum is σ = 44555614451712. Its totient is φ = 4405705063200.

The previous prime is 15421532515409. The next prime is 15421532515541. The reversal of 15421532515452 is 25451523512451.

15421532515452 is a `hidden beast` number, since 1 + 5 + 4 + 2 + 1 + 53 + 2 + 51 + 545 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 15421532515398 and 15421532515407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 612324 + ... + 5587307.

It is an arithmetic number, because the mean of its divisors is an integer number (618827978496).

Almost surely, 2^{15421532515452} is an apocalyptic number.

15421532515452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15421532515452 is an abundant number, since it is smaller than the sum of its proper divisors (29134081936260).

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

15421532515452 is a wasteful number, since it uses less digits than its factorization.

15421532515452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6209519 (or 6209514 counting only the distinct ones).

The product of its digits is 1200000, while the sum is 45.

The spelling of 15421532515452 in words is "fifteen trillion, four hundred twenty-one billion, five hundred thirty-two million, five hundred fifteen thousand, four hundred fifty-two".