25286349860 has 12 divisors (see below), whose sum is σ = 53101334748. Its totient is φ = 10114539936.

The previous prime is 25286349841. The next prime is 25286349877. The reversal of 25286349860 is 6894368252.

It can be written as a sum of positive squares in 2 ways, for example, as 15777369664 + 9508980196 = 125608^2 + 97514^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 632158727 + ... + 632158766.

It is an arithmetic number, because the mean of its divisors is an integer number (4425111229).

Almost surely, 2^25286349860 is an apocalyptic number.

25286349860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25286349860 is an abundant number, since it is smaller than the sum of its proper divisors (27814984888).

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

25286349860 is a wasteful number, since it uses less digits than its factorization.

25286349860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264317502 (or 1264317500 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 53.

The spelling of 25286349860 in words is "twenty-five billion, two hundred eighty-six million, three hundred forty-nine thousand, eight hundred sixty".