27172697680 has 40 divisors (see below), whose sum is σ = 63195955200. Its totient is φ = 10865735808.

The previous prime is 27172697659. The next prime is 27172697681. The reversal of 27172697680 is 8679627172.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27172697681) 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, 218161 + ... + 319279.

It is an arithmetic number, because the mean of its divisors is an integer number (1579898880).

Almost surely, 2^27172697680 is an apocalyptic number.

27172697680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27172697680 is an abundant number, since it is smaller than the sum of its proper divisors (36023257520).

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

27172697680 is a wasteful number, since it uses less digits than its factorization.

27172697680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104491 (or 104485 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 55.

The spelling of 27172697680 in words is "twenty-seven billion, one hundred seventy-two million, six hundred ninety-seven thousand, six hundred eighty".