27720609500 has 24 divisors (see below), whose sum is σ = 60541812240. Its totient is φ = 11088243600.

The previous prime is 27720609467. The next prime is 27720609533. The reversal of 27720609500 is 590602772.

It is an interprime number because it is at equal distance from previous prime (27720609467) and next prime (27720609533).

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 27720110 + ... + 27721109.

It is an arithmetic number, because the mean of its divisors is an integer number (2522575510).

Almost surely, 2^27720609500 is an apocalyptic number.

27720609500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27720609500 is an abundant number, since it is smaller than the sum of its proper divisors (32821202740).

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

27720609500 is a wasteful number, since it uses less digits than its factorization.

27720609500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55441238 (or 55441226 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 38.

The spelling of 27720609500 in words is "twenty-seven billion, seven hundred twenty million, six hundred nine thousand, five hundred".