15401521040420 has 24 divisors (see below), whose sum is σ = 32436402251904. Its totient is φ = 6142854498656.

The previous prime is 15401521040407. The next prime is 15401521040449. The reversal of 15401521040420 is 2404012510451.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1109612732 + ... + 1109626611.

It is an arithmetic number, because the mean of its divisors is an integer number (1351516760496).

Almost surely, 2^{15401521040420} is an apocalyptic number.

15401521040420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15401521040420 is an abundant number, since it is smaller than the sum of its proper divisors (17034881211484).

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

15401521040420 is a wasteful number, since it uses less digits than its factorization.

15401521040420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2219239699 (or 2219239697 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 29.

Adding to 15401521040420 its reverse (2404012510451), we get a palindrome (17805533550871).

The spelling of 15401521040420 in words is "fifteen trillion, four hundred one billion, five hundred twenty-one million, forty thousand, four hundred twenty".