26829597840 has 80 divisors (see below), whose sum is σ = 83488192128. Its totient is φ = 7127339008.

The previous prime is 26829597833. The next prime is 26829597901. The reversal of 26829597840 is 4879592862.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×26829597840² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149409 + ... + 275648.

Almost surely, 2^26829597840 is an apocalyptic number.

26829597840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26829597840 is an abundant number, since it is smaller than the sum of its proper divisors (56658594288).

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

26829597840 is a wasteful number, since it uses less digits than its factorization.

26829597840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425336 (or 425330 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 60.

The spelling of 26829597840 in words is "twenty-six billion, eight hundred twenty-nine million, five hundred ninety-seven thousand, eight hundred forty".