15914548961421 has 16 divisors (see below), whose sum is σ = 23182830776640. Its totient is φ = 9630849553920.

The previous prime is 15914548961407. The next prime is 15914548961459. The reversal of 15914548961421 is 12416984541951.

It is a happy number.

It is not a de Polignac number, because 15914548961421 - 2⁷ = 15914548961293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15914548961321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 358268326 + ... + 358312743.

It is an arithmetic number, because the mean of its divisors is an integer number (1448926923540).

Almost surely, 2^{15914548961421} is an apocalyptic number.

15914548961421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15914548961421 is a deficient number, since it is larger than the sum of its proper divisors (7268281815219).

15914548961421 is a wasteful number, since it uses less digits than its factorization.

15914548961421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716581756.

The product of its digits is 12441600, while the sum is 60.

The spelling of 15914548961421 in words is "fifteen trillion, nine hundred fourteen billion, five hundred forty-eight million, nine hundred sixty-one thousand, four hundred twenty-one".