491722630724 has 12 divisors (see below), whose sum is σ = 926708034924. Its totient is φ = 226948906464.

The previous prime is 491722630709. The next prime is 491722630769. The reversal of 491722630724 is 427036227194.

It can be written as a sum of positive squares in 2 ways, for example, as 69573557824 + 422149072900 = 263768^2 + 649730^2 .

It is a super-2 number, since 2×491722630724² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4728102167 + ... + 4728102270.

It is an arithmetic number, because the mean of its divisors is an integer number (77225669577).

Almost surely, 2^491722630724 is an apocalyptic number.

It is an amenable number.

491722630724 is a deficient number, since it is larger than the sum of its proper divisors (434985404200).

491722630724 is a wasteful number, since it uses less digits than its factorization.

491722630724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9456204454 (or 9456204452 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 47.

The spelling of 491722630724 in words is "four hundred ninety-one billion, seven hundred twenty-two million, six hundred thirty thousand, seven hundred twenty-four".