1521672112881 has 16 divisors (see below), whose sum is σ = 2254573902720. Its totient is φ = 1014337894320.

The previous prime is 1521672112783. The next prime is 1521672112949. The reversal of 1521672112881 is 1882112761251.

1521672112881 is a `hidden beast` number, since 1 + 521 + 6 + 7 + 2 + 112 + 8 + 8 + 1 = 666.

It is not a de Polignac number, because 1521672112881 - 2²¹ = 1521670015729 is a prime.

It is a super-2 number, since 2×1521672112881² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1521672112481) 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, 2807005 + ... + 3304938.

It is an arithmetic number, because the mean of its divisors is an integer number (140910868920).

Almost surely, 2^{1521672112881} is an apocalyptic number.

It is an amenable number.

1521672112881 is a deficient number, since it is larger than the sum of its proper divisors (732901789839).

1521672112881 is an equidigital number, since it uses as much as digits as its factorization.

1521672112881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6121173 (or 6121167 counting only the distinct ones).

The product of its digits is 107520, while the sum is 45.

The spelling of 1521672112881 in words is "one trillion, five hundred twenty-one billion, six hundred seventy-two million, one hundred twelve thousand, eight hundred eighty-one".