27198769979536 has 45 divisors (see below), whose sum is σ = 54578650663641. Its totient is φ = 13130148626112.

The previous prime is 27198769979509. The next prime is 27198769979639. The reversal of 27198769979536 is 63597996789172.

The square root of 27198769979536 is 5215244.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 14262375221136 + 12936394758400 = 3776556^2 + 3596720^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 604945825 + ... + 604990783.

Almost surely, 2^{27198769979536} is an apocalyptic number.

27198769979536 is the 5215244-th square number.

It is an amenable number.

27198769979536 is an abundant number, since it is smaller than the sum of its proper divisors (27379880684105).

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

27198769979536 is an frugal number, since it uses more digits than its factorization.

27198769979536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89984 (or 44990 counting only the distinct ones).

The product of its digits is 19443654720, while the sum is 88.

The spelling of 27198769979536 in words is "twenty-seven trillion, one hundred ninety-eight billion, seven hundred sixty-nine million, nine hundred seventy-nine thousand, five hundred thirty-six".