26555137680 has 40 divisors (see below), whose sum is σ = 82320927552. Its totient is φ = 7081369984.

The previous prime is 26555137673. The next prime is 26555137681. The reversal of 26555137680 is 8673155562.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (26555137681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55322964 + ... + 55323443.

Almost surely, 2^26555137680 is an apocalyptic number.

26555137680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26555137680 is an abundant number, since it is smaller than the sum of its proper divisors (55765789872).

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

26555137680 is a wasteful number, since it uses less digits than its factorization.

26555137680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110646423 (or 110646417 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 48.

The spelling of 26555137680 in words is "twenty-six billion, five hundred fifty-five million, one hundred thirty-seven thousand, six hundred eighty".