27756782451 has 12 divisors (see below), whose sum is σ = 40095105960. Its totient is φ = 18503609760.

The previous prime is 27756782423. The next prime is 27756782461. The reversal of 27756782451 is 15428765772.

27756782451 is a `hidden beast` number, since 2 + 7 + 7 + 567 + 8 + 24 + 51 = 666.

It is not a de Polignac number, because 27756782451 - 2⁷ = 27756782323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27756782461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 153160 + ... + 281018.

It is an arithmetic number, because the mean of its divisors is an integer number (3341258830).

Almost surely, 2^27756782451 is an apocalyptic number.

27756782451 is a deficient number, since it is larger than the sum of its proper divisors (12338323509).

27756782451 is a wasteful number, since it uses less digits than its factorization.

27756782451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151986 (or 151983 counting only the distinct ones).

The product of its digits is 6585600, while the sum is 54.

The spelling of 27756782451 in words is "twenty-seven billion, seven hundred fifty-six million, seven hundred eighty-two thousand, four hundred fifty-one".