26087767440 has 80 divisors (see below), whose sum is σ = 92425239168. Its totient is φ = 5962917888.

The previous prime is 26087767417. The next prime is 26087767441. The reversal of 26087767440 is 4476778062.

It is a happy number.

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

It is a super-2 number, since 2×26087767440² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (26087767441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7762537 + ... + 7765896.

Almost surely, 2^26087767440 is an apocalyptic number.

26087767440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26087767440 is an abundant number, since it is smaller than the sum of its proper divisors (66337471728).

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

26087767440 is a wasteful number, since it uses less digits than its factorization.

26087767440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15528456 (or 15528450 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 51.

The spelling of 26087767440 in words is "twenty-six billion, eighty-seven million, seven hundred sixty-seven thousand, four hundred forty".