27454972491 has 16 divisors (see below), whose sum is σ = 40688917920. Its totient is φ = 18296616960.

The previous prime is 27454972487. The next prime is 27454972513. The reversal of 27454972491 is 19427945472.

27454972491 is a `hidden beast` number, since 2 + 7 + 4 + 549 + 7 + 2 + 4 + 91 = 666.

It is not a de Polignac number, because 27454972491 - 2² = 27454972487 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (27454972421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110350 + ... + 259011.

It is an arithmetic number, because the mean of its divisors is an integer number (2543057370).

Almost surely, 2^27454972491 is an apocalyptic number.

27454972491 is a deficient number, since it is larger than the sum of its proper divisors (13233945429).

27454972491 is a wasteful number, since it uses less digits than its factorization.

27454972491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372123 (or 372117 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The spelling of 27454972491 in words is "twenty-seven billion, four hundred fifty-four million, nine hundred seventy-two thousand, four hundred ninety-one".