25405063131 has 8 divisors (see below), whose sum is σ = 38712477184. Its totient is φ = 14517178920.

The previous prime is 25405063091. The next prime is 25405063157. The reversal of 25405063131 is 13136050452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25405063131 - 2²⁵ = 25371508699 is a prime.

It is a super-2 number, since 2×25405063131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25405062131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 604882435 + ... + 604882476.

It is an arithmetic number, because the mean of its divisors is an integer number (4839059648).

Almost surely, 2^25405063131 is an apocalyptic number.

25405063131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25405063131 is a deficient number, since it is larger than the sum of its proper divisors (13307414053).

25405063131 is a wasteful number, since it uses less digits than its factorization.

25405063131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209764921.

The product of its (nonzero) digits is 10800, while the sum is 30.

The spelling of 25405063131 in words is "twenty-five billion, four hundred five million, sixty-three thousand, one hundred thirty-one".