25861292738 has 18 divisors (see below), whose sum is σ = 41214207531. Its totient is φ = 12168200704.

The previous prime is 25861292731. The next prime is 25861292753. The reversal of 25861292738 is 83729216852.

It can be written as a sum of positive squares in 5 ways, for example, as 25469925649 + 391367089 = 159593^2 + 19783^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=113713.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25861292738.

It is not an unprimeable number, because it can be changed into a prime (25861292731) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3862898 + ... + 3869586.

Almost surely, 2^25861292738 is an apocalyptic number.

25861292738 is a deficient number, since it is larger than the sum of its proper divisors (15352914793).

25861292738 is an frugal number, since it uses more digits than its factorization.

25861292738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13414 (or 6708 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 53.

The spelling of 25861292738 in words is "twenty-five billion, eight hundred sixty-one million, two hundred ninety-two thousand, seven hundred thirty-eight".