27780002725 has 12 divisors (see below), whose sum is σ = 35248302496. Its totient is φ = 21707164080.

The previous prime is 27780002699. The next prime is 27780002749. The reversal of 27780002725 is 52720008772.

It is not a de Polignac number, because 27780002725 - 2¹³ = 27779994533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12919857 + ... + 12922006.

Almost surely, 2^27780002725 is an apocalyptic number.

27780002725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27780002725 is a deficient number, since it is larger than the sum of its proper divisors (7468299771).

27780002725 is a wasteful number, since it uses less digits than its factorization.

27780002725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25841916 (or 25841911 counting only the distinct ones).

The product of its (nonzero) digits is 109760, while the sum is 40.

The spelling of 27780002725 in words is "twenty-seven billion, seven hundred eighty million, two thousand, seven hundred twenty-five".