25300399905 has 96 divisors (see below), whose sum is σ = 50879687040. Its totient is φ = 11501015040.

The previous prime is 25300399877. The next prime is 25300399919. The reversal of 25300399905 is 50999300352.

25300399905 is a `hidden beast` number, since 253 + 0 + 0 + 399 + 9 + 0 + 5 = 666.

It is not a de Polignac number, because 25300399905 - 2²⁷ = 25166182177 is a prime.

It is a super-2 number, since 2×25300399905² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 898419 + ... + 926151.

It is an arithmetic number, because the mean of its divisors is an integer number (529996740).

Almost surely, 2^25300399905 is an apocalyptic number.

It is an amenable number.

25300399905 is an abundant number, since it is smaller than the sum of its proper divisors (25579287135).

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

25300399905 is a wasteful number, since it uses less digits than its factorization.

25300399905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27871 (or 27868 counting only the distinct ones).

The product of its (nonzero) digits is 328050, while the sum is 45.

The spelling of 25300399905 in words is "twenty-five billion, three hundred million, three hundred ninety-nine thousand, nine hundred five".