25261907142 has 16 divisors (see below), whose sum is σ = 51598789632. Its totient is φ = 8241473160.

The previous prime is 25261907137. The next prime is 25261907191. The reversal of 25261907142 is 24170916252.

It is a self number, because there is not a number n which added to its sum of digits gives 25261907142.

It is a congruent number.

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, 44790334 + ... + 44790897.

It is an arithmetic number, because the mean of its divisors is an integer number (3224924352).

Almost surely, 2^25261907142 is an apocalyptic number.

25261907142 is an abundant number, since it is smaller than the sum of its proper divisors (26336882490).

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

25261907142 is a wasteful number, since it uses less digits than its factorization.

25261907142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89581283.

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 25261907142 in words is "twenty-five billion, two hundred sixty-one million, nine hundred seven thousand, one hundred forty-two".