25963437640 has 64 divisors (see below), whose sum is σ = 66976652160. Its totient is φ = 8873280000.

The previous prime is 25963437613. The next prime is 25963437641. The reversal of 25963437640 is 4673436952.

It is not an unprimeable number, because it can be changed into a prime (25963437641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60486 + ... + 235765.

It is an arithmetic number, because the mean of its divisors is an integer number (1046510190).

Almost surely, 2^25963437640 is an apocalyptic number.

25963437640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25963437640 is an abundant number, since it is smaller than the sum of its proper divisors (41013214520).

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

25963437640 is a wasteful number, since it uses less digits than its factorization.

25963437640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296582 (or 296578 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 49.

The spelling of 25963437640 in words is "twenty-five billion, nine hundred sixty-three million, four hundred thirty-seven thousand, six hundred forty".