26980715808 has 54 divisors (see below), whose sum is σ = 76734338499. Its totient is φ = 8992642752.

The previous prime is 26980715807. The next prime is 26980715809. The reversal of 26980715808 is 80851708962.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is an interprime number because it is at equal distance from previous prime (26980715807) and next prime (26980715809).

It can be written as a sum of positive squares in only one way, i.e., 13490357904 + 13490357904 = 116148^2 + 116148^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=116148.

It is a super-2 number, since 2×26980715808² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26980715803) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2782713 + ... + 2792391.

Almost surely, 2^26980715808 is an apocalyptic number.

It is an amenable number.

26980715808 is an abundant number, since it is smaller than the sum of its proper divisors (49753622691).

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

26980715808 is an frugal number, since it uses more digits than its factorization.

26980715808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19374 (or 9684 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

The spelling of 26980715808 in words is "twenty-six billion, nine hundred eighty million, seven hundred fifteen thousand, eight hundred eight".