25473253621 has 16 divisors (see below), whose sum is σ = 27450227200. Its totient is φ = 23560428528.

The previous prime is 25473253607. The next prime is 25473253667. The reversal of 25473253621 is 12635237452.

It is a cyclic number.

It is not a de Polignac number, because 25473253621 - 2¹⁵ = 25473220853 is a prime.

It is a super-2 number, since 2×25473253621² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25473253681) 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, 2156710 + ... + 2168488.

It is an arithmetic number, because the mean of its divisors is an integer number (1715639200).

Almost surely, 2^25473253621 is an apocalyptic number.

It is an amenable number.

25473253621 is a deficient number, since it is larger than the sum of its proper divisors (1976973579).

25473253621 is a wasteful number, since it uses less digits than its factorization.

25473253621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14488.

The product of its digits is 302400, while the sum is 40.

The spelling of 25473253621 in words is "twenty-five billion, four hundred seventy-three million, two hundred fifty-three thousand, six hundred twenty-one".