25840403862 has 48 divisors (see below), whose sum is σ = 63956655360. Its totient is φ = 6815049696.

The previous prime is 25840403851. The next prime is 25840403867. The reversal of 25840403862 is 26830404852.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25840403867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1813162 + ... + 1827357.

It is an arithmetic number, because the mean of its divisors is an integer number (1332430320).

Almost surely, 2^25840403862 is an apocalyptic number.

25840403862 is an abundant number, since it is smaller than the sum of its proper divisors (38116251498).

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

25840403862 is a wasteful number, since it uses less digits than its factorization.

25840403862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3640557 (or 3640544 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 42.

The spelling of 25840403862 in words is "twenty-five billion, eight hundred forty million, four hundred three thousand, eight hundred sixty-two".