27561423498 has 64 divisors (see below), whose sum is σ = 63445444608. Its totient is φ = 7818845760.

The previous prime is 27561423497. The next prime is 27561423521. The reversal of 27561423498 is 89432416572.

It is a super-2 number, since 2×27561423498² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 27561423498.

It is not an unprimeable number, because it can be changed into a prime (27561423493) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5524161 + ... + 5529147.

It is an arithmetic number, because the mean of its divisors is an integer number (991335072).

Almost surely, 2^27561423498 is an apocalyptic number.

27561423498 is an abundant number, since it is smaller than the sum of its proper divisors (35884021110).

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

27561423498 is a wasteful number, since it uses less digits than its factorization.

27561423498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5907.

The product of its digits is 2903040, while the sum is 51.

The spelling of 27561423498 in words is "twenty-seven billion, five hundred sixty-one million, four hundred twenty-three thousand, four hundred ninety-eight".