15421433404144 has 40 divisors (see below), whose sum is σ = 31202531436960. Its totient is φ = 7369692304128.

The previous prime is 15421433404093. The next prime is 15421433404183. The reversal of 15421433404144 is 44140433412451.

It is a junction number, because it is equal to n+sod(n) for n = 15421433404097 and 15421433404106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15938079 + ... + 16877950.

It is an arithmetic number, because the mean of its divisors is an integer number (780063285924).

Almost surely, 2^{15421433404144} is an apocalyptic number.

It is an amenable number.

15421433404144 is an abundant number, since it is smaller than the sum of its proper divisors (15781098032816).

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

15421433404144 is a wasteful number, since it uses less digits than its factorization.

15421433404144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32817337 (or 32817331 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 40.

Adding to 15421433404144 its reverse (44140433412451), we get a palindrome (59561866816595).

The spelling of 15421433404144 in words is "fifteen trillion, four hundred twenty-one billion, four hundred thirty-three million, four hundred four thousand, one hundred forty-four".