25579994682 has 48 divisors (see below), whose sum is σ = 57023953632. Its totient is φ = 7586544480.

The previous prime is 25579994641. The next prime is 25579994701. The reversal of 25579994682 is 28649997552.

It is a super-2 number, since 2×25579994682² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58068 + ... + 233520.

It is an arithmetic number, because the mean of its divisors is an integer number (1187999034).

Almost surely, 2^25579994682 is an apocalyptic number.

25579994682 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 25579994682, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28511976816).

25579994682 is an abundant number, since it is smaller than the sum of its proper divisors (31443958950).

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

25579994682 is a wasteful number, since it uses less digits than its factorization.

25579994682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175563 (or 175516 counting only the distinct ones).

The product of its digits is 97977600, while the sum is 66.

The spelling of 25579994682 in words is "twenty-five billion, five hundred seventy-nine million, nine hundred ninety-four thousand, six hundred eighty-two".