25479725722 has 16 divisors (see below), whose sum is σ = 42400778400. Its totient is φ = 11385393040.

The previous prime is 25479725693. The next prime is 25479725731. The reversal of 25479725722 is 22752797452.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 25479725722.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9813697 + ... + 9816292.

It is an arithmetic number, because the mean of its divisors is an integer number (2650048650).

Almost surely, 2^25479725722 is an apocalyptic number.

25479725722 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25479725722 is a deficient number, since it is larger than the sum of its proper divisors (16921052678).

25479725722 is a wasteful number, since it uses less digits than its factorization.

25479725722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19630061.

The product of its digits is 4939200, while the sum is 52.

The spelling of 25479725722 in words is "twenty-five billion, four hundred seventy-nine million, seven hundred twenty-five thousand, seven hundred twenty-two".