26191077580 has 12 divisors (see below), whose sum is σ = 55001262960. Its totient is φ = 10476431024.

The previous prime is 26191077481. The next prime is 26191077581. The reversal of 26191077580 is 8577019162.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 26191077580.

It is not an unprimeable number, because it can be changed into a prime (26191077581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 654776920 + ... + 654776959.

It is an arithmetic number, because the mean of its divisors is an integer number (4583438580).

Almost surely, 2^26191077580 is an apocalyptic number.

26191077580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26191077580 is an abundant number, since it is smaller than the sum of its proper divisors (28810185380).

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

26191077580 is a wasteful number, since it uses less digits than its factorization.

26191077580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309553888 (or 1309553886 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 46.

The spelling of 26191077580 in words is "twenty-six billion, one hundred ninety-one million, seventy-seven thousand, five hundred eighty".