27725361646 has 4 divisors (see below), whose sum is σ = 41588042472. Its totient is φ = 13862680822.

The previous prime is 27725361607. The next prime is 27725361647. The reversal of 27725361646 is 64616352772.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 27725361646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27725361647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6931340410 + ... + 6931340413.

It is an arithmetic number, because the mean of its divisors is an integer number (10397010618).

Almost surely, 2^27725361646 is an apocalyptic number.

27725361646 is a deficient number, since it is larger than the sum of its proper divisors (13862680826).

27725361646 is a wasteful number, since it uses less digits than its factorization.

27725361646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13862680825.

The product of its digits is 2540160, while the sum is 49.

The spelling of 27725361646 in words is "twenty-seven billion, seven hundred twenty-five million, three hundred sixty-one thousand, six hundred forty-six".