756481157 has 2 divisors, whose sum is σ = 756481158. Its totient is φ = 756481156.

The previous prime is 756481139. The next prime is 756481163. The reversal of 756481157 is 751184657.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 599956036 + 156525121 = 24494^2 + 12511^2 .

It is a cyclic number.

It is not a de Polignac number, because 756481157 - 2⁶ = 756481093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (756481457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 378240578 + 378240579.

It is an arithmetic number, because the mean of its divisors is an integer number (378240579).

Almost surely, 2^756481157 is an apocalyptic number.

It is an amenable number.

756481157 is a deficient number, since it is larger than the sum of its proper divisors (1).

756481157 is an equidigital number, since it uses as much as digits as its factorization.

756481157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 235200, while the sum is 44.

The square root of 756481157 is about 27504.2025334311. The cubic root of 756481157 is about 911.1699146026.

The spelling of 756481157 in words is "seven hundred fifty-six million, four hundred eighty-one thousand, one hundred fifty-seven".