26891370990 has 96 divisors (see below), whose sum is σ = 76393414656. Its totient is φ = 6508889280.

The previous prime is 26891370983. The next prime is 26891370997. The reversal of 26891370990 is 9907319862.

26891370990 is a `hidden beast` number, since 268 + 9 + 1 + 370 + 9 + 9 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (26891370983) and next prime (26891370997).

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26891370997) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 619539 + ... + 661521.

It is an arithmetic number, because the mean of its divisors is an integer number (795764736).

Almost surely, 2^26891370990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26891370990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38196707328).

26891370990 is an abundant number, since it is smaller than the sum of its proper divisors (49502043666).

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

26891370990 is a wasteful number, since it uses less digits than its factorization.

26891370990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42654 (or 42651 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The spelling of 26891370990 in words is "twenty-six billion, eight hundred ninety-one million, three hundred seventy thousand, nine hundred ninety".