25725907779 has 32 divisors (see below), whose sum is σ = 40446809088. Its totient is φ = 14338944000.

The previous prime is 25725907763. The next prime is 25725907807. The reversal of 25725907779 is 97770952752.

It is not a de Polignac number, because 25725907779 - 2⁴ = 25725907763 is a prime.

It is a super-2 number, since 2×25725907779² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25725907729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5619 + ... + 226899.

It is an arithmetic number, because the mean of its divisors is an integer number (1263962784).

Almost surely, 2^25725907779 is an apocalyptic number.

25725907779 is a deficient number, since it is larger than the sum of its proper divisors (14720901309).

25725907779 is a wasteful number, since it uses less digits than its factorization.

25725907779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221579.

The product of its (nonzero) digits is 19448100, while the sum is 60.

The spelling of 25725907779 in words is "twenty-five billion, seven hundred twenty-five million, nine hundred seven thousand, seven hundred seventy-nine".