21575725495452 has 48 divisors (see below), whose sum is σ = 55939607610880. Its totient is φ = 7191581732784.

The previous prime is 21575725495433. The next prime is 21575725495453. The reversal of 21575725495452 is 25459452757512.

21575725495452 is a `hidden beast` number, since 2 + 1 + 5 + 7 + 572 + 5 + 4 + 9 + 5 + 4 + 52 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 21575725495452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21575725495453) 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, 2144578 + ... + 6910185.

Almost surely, 2^{21575725495452} is an apocalyptic number.

It is an amenable number.

21575725495452 is an abundant number, since it is smaller than the sum of its proper divisors (34363882115428).

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

21575725495452 is a wasteful number, since it uses less digits than its factorization.

21575725495452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9076839 (or 9076831 counting only the distinct ones).

The product of its digits is 176400000, while the sum is 63.

The spelling of 21575725495452 in words is "twenty-one trillion, five hundred seventy-five billion, seven hundred twenty-five million, four hundred ninety-five thousand, four hundred fifty-two".