26787774540 has 24 divisors (see below), whose sum is σ = 75005768880. Its totient is φ = 7143406528.

The previous prime is 26787774523. The next prime is 26787774553. The reversal of 26787774540 is 4547778762.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223231395 + ... + 223231514.

It is an arithmetic number, because the mean of its divisors is an integer number (3125240370).

Almost surely, 2^26787774540 is an apocalyptic number.

26787774540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26787774540 is an abundant number, since it is smaller than the sum of its proper divisors (48217994340).

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

26787774540 is a wasteful number, since it uses less digits than its factorization.

26787774540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446462921 (or 446462919 counting only the distinct ones).

The product of its (nonzero) digits is 18439680, while the sum is 57.

The spelling of 26787774540 in words is "twenty-six billion, seven hundred eighty-seven million, seven hundred seventy-four thousand, five hundred forty".