275138765247 has 4 divisors (see below), whose sum is σ = 366851687000. Its totient is φ = 183425843496.

The previous prime is 275138765243. The next prime is 275138765249. The reversal of 275138765247 is 742567831572.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 275138765247 - 2² = 275138765243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275138765243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45856460872 + ... + 45856460877.

It is an arithmetic number, because the mean of its divisors is an integer number (91712921750).

Almost surely, 2^275138765247 is an apocalyptic number.

275138765247 is a deficient number, since it is larger than the sum of its proper divisors (91712921753).

275138765247 is an equidigital number, since it uses as much as digits as its factorization.

275138765247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91712921752.

The product of its digits is 19756800, while the sum is 57.

The spelling of 275138765247 in words is "two hundred seventy-five billion, one hundred thirty-eight million, seven hundred sixty-five thousand, two hundred forty-seven".