756481057 has 4 divisors (see below), whose sum is σ = 757189780. Its totient is φ = 755772336.

The previous prime is 756481051. The next prime is 756481081. The reversal of 756481057 is 750184657.

756481057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 227527056 + 528954001 = 15084^2 + 22999^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-756481057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (756481051) 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, 352758 + ... + 354895.

It is an arithmetic number, because the mean of its divisors is an integer number (189297445).

Almost surely, 2^756481057 is an apocalyptic number.

It is an amenable number.

756481057 is a deficient number, since it is larger than the sum of its proper divisors (708723).

756481057 is a wasteful number, since it uses less digits than its factorization.

756481057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 708722.

The product of its (nonzero) digits is 235200, while the sum is 43.

The square root of 756481057 is about 27504.2007155271. The cubic root of 756481057 is about 911.1698744531.

The spelling of 756481057 in words is "seven hundred fifty-six million, four hundred eighty-one thousand, fifty-seven".