26857387579440 has 80 divisors (see below), whose sum is σ = 90826801641216. Its totient is φ = 6510881836800.

The previous prime is 26857387579427. The next prime is 26857387579457. The reversal of 26857387579440 is 4497578375862.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5086623796 + ... + 5086629075.

Almost surely, 2^{26857387579440} is an apocalyptic number.

26857387579440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26857387579440 is an abundant number, since it is smaller than the sum of its proper divisors (63969414061776).

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

26857387579440 is a wasteful number, since it uses less digits than its factorization.

26857387579440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10173252898 (or 10173252892 counting only the distinct ones).

The product of its (nonzero) digits is 2844979200, while the sum is 75.

The spelling of 26857387579440 in words is "twenty-six trillion, eight hundred fifty-seven billion, three hundred eighty-seven million, five hundred seventy-nine thousand, four hundred forty".