27197994172 has 24 divisors (see below), whose sum is σ = 49244680800. Its totient is φ = 13128217536.

The previous prime is 27197994157. The next prime is 27197994193. The reversal of 27197994172 is 27149979172.

It is a Harshad number since it is a multiple of its sum of digits (58).

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, 1188454 + ... + 1211122.

It is an arithmetic number, because the mean of its divisors is an integer number (2051861700).

Almost surely, 2^27197994172 is an apocalyptic number.

It is an amenable number.

27197994172 is a deficient number, since it is larger than the sum of its proper divisors (22046686628).

27197994172 is a wasteful number, since it uses less digits than its factorization.

27197994172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33045 (or 33043 counting only the distinct ones).

The product of its digits is 4000752, while the sum is 58.

The spelling of 27197994172 in words is "twenty-seven billion, one hundred ninety-seven million, nine hundred ninety-four thousand, one hundred seventy-two".