25279091982 has 32 divisors (see below), whose sum is σ = 56332281600. Its totient is φ = 8402885784.

The previous prime is 25279091941. The next prime is 25279091993. The reversal of 25279091982 is 28919097252.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 632608 + ... + 671379.

It is an arithmetic number, because the mean of its divisors is an integer number (1760383800).

Almost surely, 2^25279091982 is an apocalyptic number.

25279091982 is an abundant number, since it is smaller than the sum of its proper divisors (31053189618).

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

25279091982 is a wasteful number, since it uses less digits than its factorization.

25279091982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304357 (or 1304351 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

Adding to 25279091982 its sum of digits (54), we get a square (25279092036 = 158994²).

The spelling of 25279091982 in words is "twenty-five billion, two hundred seventy-nine million, ninety-one thousand, nine hundred eighty-two".