25194865942 has 16 divisors (see below), whose sum is σ = 39842000352. Its totient is φ = 11925492480.

The previous prime is 25194865933. The next prime is 25194865981. The reversal of 25194865942 is 24956849152.

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, 2818809 + ... + 2827732.

It is an arithmetic number, because the mean of its divisors is an integer number (2490125022).

Almost surely, 2^25194865942 is an apocalyptic number.

25194865942 is a deficient number, since it is larger than the sum of its proper divisors (14647134410).

25194865942 is a wasteful number, since it uses less digits than its factorization.

25194865942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5646663.

The product of its digits is 6220800, while the sum is 55.

It can be divided in two parts, 25194 and 865942, that added together give a square (891136 = 944²).

The spelling of 25194865942 in words is "twenty-five billion, one hundred ninety-four million, eight hundred sixty-five thousand, nine hundred forty-two".