27561947974 has 48 divisors (see below), whose sum is σ = 46233579168. Its totient is φ = 12312080000.

The previous prime is 27561947957. The next prime is 27561947983. The reversal of 27561947974 is 47974916572.

It is a super-2 number, since 2×27561947974² (a number of 22 digits) contains 22 as substring.

It is a congruent 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 23 ways as a sum of consecutive naturals, for example, 3344439 + ... + 3352669.

It is an arithmetic number, because the mean of its divisors is an integer number (963199566).

Almost surely, 2^27561947974 is an apocalyptic number.

27561947974 is a deficient number, since it is larger than the sum of its proper divisors (18671631194).

27561947974 is a wasteful number, since it uses less digits than its factorization.

27561947974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8493 (or 8482 counting only the distinct ones).

The product of its digits is 26671680, while the sum is 61.

The spelling of 27561947974 in words is "twenty-seven billion, five hundred sixty-one million, nine hundred forty-seven thousand, nine hundred seventy-four".