26987239776 has 48 divisors (see below), whose sum is σ = 80961721344. Its totient is φ = 7710639744.

The previous prime is 26987239753. The next prime is 26987239831. The reversal of 26987239776 is 67793278962.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×26987239776² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20079120 + ... + 20080463.

It is an arithmetic number, because the mean of its divisors is an integer number (1686702528).

Almost surely, 2^26987239776 is an apocalyptic number.

It is an amenable number.

26987239776 is an abundant number, since it is smaller than the sum of its proper divisors (53974481568).

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

26987239776 is a wasteful number, since it uses less digits than its factorization.

26987239776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40159603 (or 40159595 counting only the distinct ones).

The product of its digits is 96018048, while the sum is 66.

The spelling of 26987239776 in words is "twenty-six billion, nine hundred eighty-seven million, two hundred thirty-nine thousand, seven hundred seventy-six".