25493779920946 has 16 divisors (see below), whose sum is σ = 38280166139160. Its totient is φ = 12733726711680.

The previous prime is 25493779920923. The next prime is 25493779920967. The reversal of 25493779920946 is 64902997739452.

It can be written as a sum of positive squares in 4 ways, for example, as 22594916134921 + 2898863786025 = 4753411^2 + 1702605^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23223550 + ... + 24296518.

Almost surely, 2^{25493779920946} is an apocalyptic number.

25493779920946 is a deficient number, since it is larger than the sum of its proper divisors (12786386218214).

25493779920946 is a wasteful number, since it uses less digits than its factorization.

25493779920946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085229.

The product of its (nonzero) digits is 1851776640, while the sum is 76.

The spelling of 25493779920946 in words is "twenty-five trillion, four hundred ninety-three billion, seven hundred seventy-nine million, nine hundred twenty thousand, nine hundred forty-six".