25401305539 has 4 divisors (see below), whose sum is σ = 25422178824. Its totient is φ = 25380432256.

The previous prime is 25401305537. The next prime is 25401305569. The reversal of 25401305539 is 93550310452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25401305539 - 2¹ = 25401305537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25401305498 and 25401305507.

It is not an unprimeable number, because it can be changed into a prime (25401305537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10434817 + ... + 10437250.

It is an arithmetic number, because the mean of its divisors is an integer number (6355544706).

Almost surely, 2^25401305539 is an apocalyptic number.

25401305539 is a deficient number, since it is larger than the sum of its proper divisors (20873285).

25401305539 is a wasteful number, since it uses less digits than its factorization.

25401305539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20873284.

The product of its (nonzero) digits is 81000, while the sum is 37.

The spelling of 25401305539 in words is "twenty-five billion, four hundred one million, three hundred five thousand, five hundred thirty-nine".