27579797698 has 4 divisors (see below), whose sum is σ = 41369696550. Its totient is φ = 13789898848.

The previous prime is 27579797689. The next prime is 27579797699. The reversal of 27579797698 is 89679797572.

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

It can be written as a sum of positive squares in only one way, i.e., 27028346409 + 551451289 = 164403^2 + 23483^2 .

It is a Smith number, since the sum of its digits (76) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (27579797699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6894949423 + ... + 6894949426.

Almost surely, 2^27579797698 is an apocalyptic number.

27579797698 is a deficient number, since it is larger than the sum of its proper divisors (13789898852).

27579797698 is a wasteful number, since it uses less digits than its factorization.

27579797698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13789898851.

The product of its digits is 840157920, while the sum is 76.

The spelling of 27579797698 in words is "twenty-seven billion, five hundred seventy-nine million, seven hundred ninety-seven thousand, six hundred ninety-eight".