25405700425 has 24 divisors (see below), whose sum is σ = 36107349696. Its totient is φ = 17370805440.

The previous prime is 25405700423. The next prime is 25405700477. The reversal of 25405700425 is 52400750452.

It is not a de Polignac number, because 25405700425 - 2¹ = 25405700423 is a prime.

It is a super-2 number, since 2×25405700425² (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 (25405700423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 148462 + ... + 269911.

It is an arithmetic number, because the mean of its divisors is an integer number (1504472904).

Almost surely, 2^25405700425 is an apocalyptic number.

25405700425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25405700425 is a deficient number, since it is larger than the sum of its proper divisors (10701649271).

25405700425 is a wasteful number, since it uses less digits than its factorization.

25405700425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418737 (or 418732 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 34.

The spelling of 25405700425 in words is "twenty-five billion, four hundred five million, seven hundred thousand, four hundred twenty-five".