27779440764 has 24 divisors (see below), whose sum is σ = 64829318400. Its totient is φ = 9258295984.

The previous prime is 27779440753. The next prime is 27779440769. The reversal of 27779440764 is 46704497772.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27779440769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112164 + ... + 261035.

It is an arithmetic number, because the mean of its divisors is an integer number (2701221600).

Almost surely, 2^27779440764 is an apocalyptic number.

It is an amenable number.

27779440764 is an abundant number, since it is smaller than the sum of its proper divisors (37049877636).

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

27779440764 is a wasteful number, since it uses less digits than its factorization.

27779440764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379409 (or 379407 counting only the distinct ones).

The product of its (nonzero) digits is 16595712, while the sum is 57.

The spelling of 27779440764 in words is "twenty-seven billion, seven hundred seventy-nine million, four hundred forty thousand, seven hundred sixty-four".