27072072749 has 2 divisors, whose sum is σ = 27072072750. Its totient is φ = 27072072748.

The previous prime is 27072072691. The next prime is 27072072757. The reversal of 27072072749 is 94727027072.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24938094724 + 2133978025 = 157918^2 + 46195^2 .

It is a cyclic number.

It is not a de Polignac number, because 27072072749 - 2⁸ = 27072072493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27072072799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13536036374 + 13536036375.

It is an arithmetic number, because the mean of its divisors is an integer number (13536036375).

Almost surely, 2^27072072749 is an apocalyptic number.

It is an amenable number.

27072072749 is a deficient number, since it is larger than the sum of its proper divisors (1).

27072072749 is an equidigital number, since it uses as much as digits as its factorization.

27072072749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 691488, while the sum is 47.

The spelling of 27072072749 in words is "twenty-seven billion, seventy-two million, seventy-two thousand, seven hundred forty-nine".