21725137612075 has 48 divisors (see below), whose sum is σ = 28504624158720. Its totient is φ = 16391900004480.

The previous prime is 21725137612039. The next prime is 21725137612183. The reversal of 21725137612075 is 57021673152712.

It is not a de Polignac number, because 21725137612075 - 2²¹ = 21725135514923 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33428929 + ... + 34072621.

It is an arithmetic number, because the mean of its divisors is an integer number (593846336640).

Almost surely, 2^{21725137612075} is an apocalyptic number.

21725137612075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21725137612075 is a deficient number, since it is larger than the sum of its proper divisors (6779486546645).

21725137612075 is a wasteful number, since it uses less digits than its factorization.

21725137612075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644548 (or 644543 counting only the distinct ones).

The product of its (nonzero) digits is 1234800, while the sum is 49.

The spelling of 21725137612075 in words is "twenty-one trillion, seven hundred twenty-five billion, one hundred thirty-seven million, six hundred twelve thousand, seventy-five".