26431864992 has 108 divisors (see below), whose sum is σ = 81392503374. Its totient is φ = 8132866560.

The previous prime is 26431864961. The next prime is 26431864999. The reversal of 26431864992 is 29946813462.

26431864992 is a `hidden beast` number, since 2 + 6 + 431 + 86 + 49 + 92 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 8345918736 + 18085946256 = 91356^2 + 134484^2 .

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (26431864999) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 222859 + ... + 320202.

Almost surely, 2^26431864992 is an apocalyptic number.

It is an amenable number.

26431864992 is an abundant number, since it is smaller than the sum of its proper divisors (54960638382).

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

26431864992 is a wasteful number, since it uses less digits than its factorization.

26431864992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543103 (or 543079 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 54.

The spelling of 26431864992 in words is "twenty-six billion, four hundred thirty-one million, eight hundred sixty-four thousand, nine hundred ninety-two".