26378137986 has 16 divisors (see below), whose sum is σ = 52769220768. Its totient is φ = 8790555200.

The previous prime is 26378137963. The next prime is 26378138021. The reversal of 26378137986 is 68973187362.

It is a super-2 number, since 2×26378137986² (a number of 22 digits) contains 22 as substring.

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, 512775 + ... + 561866.

It is an arithmetic number, because the mean of its divisors is an integer number (3298076298).

Almost surely, 2^26378137986 is an apocalyptic number.

26378137986 is an abundant number, since it is smaller than the sum of its proper divisors (26391082782).

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

26378137986 is a wasteful number, since it uses less digits than its factorization.

26378137986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078737.

The product of its digits is 18289152, while the sum is 60.

The spelling of 26378137986 in words is "twenty-six billion, three hundred seventy-eight million, one hundred thirty-seven thousand, nine hundred eighty-six".