491667253701 has 32 divisors (see below), whose sum is σ = 743685949440. Its totient is φ = 286429742784.

The previous prime is 491667253667. The next prime is 491667253787. The reversal of 491667253701 is 107352766194.

It is a de Polignac number, because none of the positive numbers 2^k-491667253701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491667253801) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 770256 + ... + 1255638.

It is an arithmetic number, because the mean of its divisors is an integer number (23240185920).

Almost surely, 2^491667253701 is an apocalyptic number.

It is an amenable number.

491667253701 is a deficient number, since it is larger than the sum of its proper divisors (252018695739).

491667253701 is a wasteful number, since it uses less digits than its factorization.

491667253701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486785.

The product of its (nonzero) digits is 1905120, while the sum is 51.

The spelling of 491667253701 in words is "four hundred ninety-one billion, six hundred sixty-seven million, two hundred fifty-three thousand, seven hundred one".