671767854023 has 32 divisors (see below), whose sum is σ = 850802641920. Its totient is φ = 516801415680.

The previous prime is 671767853969. The next prime is 671767854053. The reversal of 671767854023 is 320458767176.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 671767854023 - 2¹⁰ = 671767852999 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 671767854023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671767854053) 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, 535193 + ... + 1276701.

It is an arithmetic number, because the mean of its divisors is an integer number (26587582560).

Almost surely, 2^671767854023 is an apocalyptic number.

671767854023 is a deficient number, since it is larger than the sum of its proper divisors (179034787897).

671767854023 is a wasteful number, since it uses less digits than its factorization.

671767854023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741887.

The product of its (nonzero) digits is 11854080, while the sum is 56.

The spelling of 671767854023 in words is "six hundred seventy-one billion, seven hundred sixty-seven million, eight hundred fifty-four thousand, twenty-three".