26199857440 has 48 divisors (see below), whose sum is σ = 64031559480. Its totient is φ = 10118563840.

The previous prime is 26199857423. The next prime is 26199857443. The reversal of 26199857440 is 4475899162.

It can be written as a sum of positive squares in 4 ways, for example, as 24110636176 + 2089221264 = 155276^2 + 45708^2 .

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (26199857443) 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, 2818621 + ... + 2827900.

Almost surely, 2^26199857440 is an apocalyptic number.

26199857440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26199857440 is an abundant number, since it is smaller than the sum of its proper divisors (37831702040).

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

26199857440 is a wasteful number, since it uses less digits than its factorization.

26199857440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5646565 (or 5646557 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 26199857440 in words is "twenty-six billion, one hundred ninety-nine million, eight hundred fifty-seven thousand, four hundred forty".