25499978682 has 32 divisors (see below), whose sum is σ = 54044589312. Its totient is φ = 7993380864.

The previous prime is 25499978677. The next prime is 25499978683. The reversal of 25499978682 is 28687999452.

It is not an unprimeable number, because it can be changed into a prime (25499978683) 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, 21423 + ... + 226845.

It is an arithmetic number, because the mean of its divisors is an integer number (1688893416).

Almost surely, 2^25499978682 is an apocalyptic number.

25499978682 is an abundant number, since it is smaller than the sum of its proper divisors (28544610630).

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

25499978682 is a wasteful number, since it uses less digits than its factorization.

25499978682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206662.

The product of its digits is 156764160, while the sum is 69.

The spelling of 25499978682 in words is "twenty-five billion, four hundred ninety-nine million, nine hundred seventy-eight thousand, six hundred eighty-two".