7256740913 has 4 divisors (see below), whose sum is σ = 7265209380. Its totient is φ = 7248272448.

The previous prime is 7256740903. The next prime is 7256740919. The reversal of 7256740913 is 3190476527.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5749127329 + 1507613584 = 75823^2 + 38828^2 .

It is a cyclic number.

It is not a de Polignac number, because 7256740913 - 2⁸ = 7256740657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7256740919) 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, 4232948 + ... + 4234661.

It is an arithmetic number, because the mean of its divisors is an integer number (1816302345).

Almost surely, 2^7256740913 is an apocalyptic number.

It is an amenable number.

7256740913 is a deficient number, since it is larger than the sum of its proper divisors (8468467).

7256740913 is an equidigital number, since it uses as much as digits as its factorization.

7256740913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8468466.

The product of its (nonzero) digits is 317520, while the sum is 44.

The square root of 7256740913 is about 85186.5066369082. The cubic root of 7256740913 is about 1936.0379791608.

The spelling of 7256740913 in words is "seven billion, two hundred fifty-six million, seven hundred forty thousand, nine hundred thirteen".