25565400650 has 48 divisors (see below), whose sum is σ = 48693312000. Its totient is φ = 9982589760.

The previous prime is 25565400647. The next prime is 25565400667. The reversal of 25565400650 is 5600456552.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 503111 + ... + 551589.

It is an arithmetic number, because the mean of its divisors is an integer number (1014444000).

Almost surely, 2^25565400650 is an apocalyptic number.

25565400650 is a deficient number, since it is larger than the sum of its proper divisors (23127911350).

25565400650 is a wasteful number, since it uses less digits than its factorization.

25565400650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48743 (or 48738 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 38.

The spelling of 25565400650 in words is "twenty-five billion, five hundred sixty-five million, four hundred thousand, six hundred fifty".