7256878747 has 4 divisors (see below), whose sum is σ = 7276334560. Its totient is φ = 7237422936.

The previous prime is 7256878729. The next prime is 7256878799. The reversal of 7256878747 is 7478786527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7478786527 = 10331 ⋅723917.

It is a cyclic number.

It is not a de Polignac number, because 7256878747 - 2⁷ = 7256878619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7256878147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9727347 + ... + 9728092.

It is an arithmetic number, because the mean of its divisors is an integer number (1819083640).

Almost surely, 2^7256878747 is an apocalyptic number.

7256878747 is a deficient number, since it is larger than the sum of its proper divisors (19455813).

7256878747 is a wasteful number, since it uses less digits than its factorization.

7256878747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19455812.

The product of its digits is 36879360, while the sum is 61.

The square root of 7256878747 is about 85187.3156461688. The cubic root of 7256878747 is about 1936.0502367373.

The spelling of 7256878747 in words is "seven billion, two hundred fifty-six million, eight hundred seventy-eight thousand, seven hundred forty-seven".