26172897496920 has 80 divisors (see below), whose sum is σ = 87970016597760. Its totient is φ = 6979439331648.

The previous prime is 26172897496913. The next prime is 26172897496931. The reversal of 26172897496920 is 2969479827162.

26172897496920 is a `hidden beast` number, since 2 + 6 + 1 + 7 + 28 + 97 + 496 + 9 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4039024152 + ... + 4039030631.

It is an arithmetic number, because the mean of its divisors is an integer number (1099625207472).

Almost surely, 2^{26172897496920} is an apocalyptic number.

26172897496920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26172897496920 is an abundant number, since it is smaller than the sum of its proper divisors (61797119100840).

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

26172897496920 is a wasteful number, since it uses less digits than its factorization.

26172897496920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8078054806 (or 8078054793 counting only the distinct ones).

The product of its (nonzero) digits is 329204736, while the sum is 72.

The spelling of 26172897496920 in words is "twenty-six trillion, one hundred seventy-two billion, eight hundred ninety-seven million, four hundred ninety-six thousand, nine hundred twenty".