491056756 has 6 divisors (see below), whose sum is σ = 859349330. Its totient is φ = 245528376.

The previous prime is 491056733. The next prime is 491056757. The reversal of 491056756 is 657650194.

It can be written as a sum of positive squares in only one way, i.e., 303804900 + 187251856 = 17430^2 + 13684^2 .

It is a super-2 number, since 2×491056756² = 482273475226487072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491056757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61382091 + ... + 61382098.

Almost surely, 2^491056756 is an apocalyptic number.

It is an amenable number.

491056756 is a deficient number, since it is larger than the sum of its proper divisors (368292574).

491056756 is a wasteful number, since it uses less digits than its factorization.

491056756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122764193 (or 122764191 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 491056756 is about 22159.8004503651. The cubic root of 491056756 is about 788.9398566143.

The spelling of 491056756 in words is "four hundred ninety-one million, fifty-six thousand, seven hundred fifty-six".