25164879442 has 16 divisors (see below), whose sum is σ = 40028251032. Its totient is φ = 11824369920.

The previous prime is 25164879437. The next prime is 25164879461. The reversal of 25164879442 is 24497846152.

It can be written as a sum of positive squares in 4 ways, for example, as 23027759001 + 2137120441 = 151749^2 + 46229^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25164879442.

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, 537393 + ... + 582340.

Almost surely, 2^25164879442 is an apocalyptic number.

25164879442 is a deficient number, since it is larger than the sum of its proper divisors (14863371590).

25164879442 is a wasteful number, since it uses less digits than its factorization.

25164879442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120413.

The product of its digits is 3870720, while the sum is 52.

The spelling of 25164879442 in words is "twenty-five billion, one hundred sixty-four million, eight hundred seventy-nine thousand, four hundred forty-two".