27256725747 has 20 divisors (see below), whose sum is σ = 42859831080. Its totient is φ = 17214773184.

The previous prime is 27256725737. The next prime is 27256725757. The reversal of 27256725747 is 74752765272.

It is a happy number.

27256725747 is a `hidden beast` number, since 2 + 7 + 2 + 5 + 67 + 2 + 574 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (27256725737) and next prime (27256725757).

It is a de Polignac number, because none of the positive numbers 2^k-27256725747 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 a junction number, because it is equal to n+sod(n) for n = 27256725693 and 27256725702.

It is not an unprimeable number, because it can be changed into a prime (27256725737) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8853798 + ... + 8856875.

It is an arithmetic number, because the mean of its divisors is an integer number (2142991554).

Almost surely, 2^27256725747 is an apocalyptic number.

27256725747 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

27256725747 is a deficient number, since it is larger than the sum of its proper divisors (15603105333).

27256725747 is a wasteful number, since it uses less digits than its factorization.

27256725747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17710704 (or 17710695 counting only the distinct ones).

The product of its digits is 11524800, while the sum is 54.

The spelling of 27256725747 in words is "twenty-seven billion, two hundred fifty-six million, seven hundred twenty-five thousand, seven hundred forty-seven".