27945153784 has 32 divisors (see below), whose sum is σ = 52578501120. Its totient is φ = 13924285056.

The previous prime is 27945153751. The next prime is 27945153823. The reversal of 27945153784 is 48735154972.

It is a super-2 number, since 2×27945153784² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4448854 + ... + 4455130.

It is an arithmetic number, because the mean of its divisors is an integer number (1643078160).

Almost surely, 2^27945153784 is an apocalyptic number.

It is an amenable number.

27945153784 is a deficient number, since it is larger than the sum of its proper divisors (24633347336).

27945153784 is a wasteful number, since it uses less digits than its factorization.

27945153784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8119 (or 8115 counting only the distinct ones).

The product of its digits is 8467200, while the sum is 55.

The spelling of 27945153784 in words is "twenty-seven billion, nine hundred forty-five million, one hundred fifty-three thousand, seven hundred eighty-four".