27491698065 has 32 divisors (see below), whose sum is σ = 48037522176. Its totient is φ = 13343742720.

The previous prime is 27491698057. The next prime is 27491698123. The reversal of 27491698065 is 56089619472.

It is not a de Polignac number, because 27491698065 - 2³ = 27491698057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27491697996 and 27491698014.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 978994 + ... + 1006683.

It is an arithmetic number, because the mean of its divisors is an integer number (1501172568).

Almost surely, 2^27491698065 is an apocalyptic number.

It is an amenable number.

27491698065 is a deficient number, since it is larger than the sum of its proper divisors (20545824111).

27491698065 is a wasteful number, since it uses less digits than its factorization.

27491698065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1985769.

The product of its (nonzero) digits is 6531840, while the sum is 57.

The spelling of 27491698065 in words is "twenty-seven billion, four hundred ninety-one million, six hundred ninety-eight thousand, sixty-five".