491256838762 has 4 divisors (see below), whose sum is σ = 736885258146. Its totient is φ = 245628419380.

The previous prime is 491256838711. The next prime is 491256838799. The reversal of 491256838762 is 267838652194.

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

It can be written as a sum of positive squares in only one way, i.e., 352799172961 + 138457665801 = 593969^2 + 372099^2 .

It is a super-3 number, since 3×491256838762³ (a number of 36 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 491256838762.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122814209689 + ... + 122814209692.

Almost surely, 2^491256838762 is an apocalyptic number.

491256838762 is a deficient number, since it is larger than the sum of its proper divisors (245628419384).

491256838762 is a wasteful number, since it uses less digits than its factorization.

491256838762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245628419383.

The product of its digits is 34836480, while the sum is 61.

The spelling of 491256838762 in words is "four hundred ninety-one billion, two hundred fifty-six million, eight hundred thirty-eight thousand, seven hundred sixty-two".