25406091650 has 12 divisors (see below), whose sum is σ = 47255330562. Its totient is φ = 10162436640.

The previous prime is 25406091647. The next prime is 25406091679. The reversal of 25406091650 is 5619060452.

It can be written as a sum of positive squares in 3 ways, for example, as 9681182449 + 15724909201 = 98393^2 + 125399^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 254060867 + ... + 254060966.

Almost surely, 2^25406091650 is an apocalyptic number.

25406091650 is a deficient number, since it is larger than the sum of its proper divisors (21849238912).

25406091650 is a wasteful number, since it uses less digits than its factorization.

25406091650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508121845 (or 508121840 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 25406091650 in words is "twenty-five billion, four hundred six million, ninety-one thousand, six hundred fifty".