25280455778 has 16 divisors (see below), whose sum is σ = 40303992960. Its totient is φ = 11851446336.

The previous prime is 25280455771. The next prime is 25280455799. The reversal of 25280455778 is 87755408252.

It is not an unprimeable number, because it can be changed into a prime (25280455771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1404638 + ... + 1422521.

It is an arithmetic number, because the mean of its divisors is an integer number (2518999560).

Almost surely, 2^25280455778 is an apocalyptic number.

25280455778 is a deficient number, since it is larger than the sum of its proper divisors (15023537182).

25280455778 is a wasteful number, since it uses less digits than its factorization.

25280455778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2827441.

The product of its (nonzero) digits is 6272000, while the sum is 53.

The spelling of 25280455778 in words is "twenty-five billion, two hundred eighty million, four hundred fifty-five thousand, seven hundred seventy-eight".