27197604645 has 16 divisors (see below), whose sum is σ = 43520016192. Its totient is φ = 14504106240.

The previous prime is 27197604641. The next prime is 27197604659. The reversal of 27197604645 is 54640679172.

It is a happy number.

It is not a de Polignac number, because 27197604645 - 2² = 27197604641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27197604641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109554 + ... + 257676.

It is an arithmetic number, because the mean of its divisors is an integer number (2720001012).

Almost surely, 2^27197604645 is an apocalyptic number.

It is an amenable number.

27197604645 is a deficient number, since it is larger than the sum of its proper divisors (16322411547).

27197604645 is a wasteful number, since it uses less digits than its factorization.

27197604645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160372.

The product of its (nonzero) digits is 2540160, while the sum is 51.

The spelling of 27197604645 in words is "twenty-seven billion, one hundred ninety-seven million, six hundred four thousand, six hundred forty-five".