867851640644 has 12 divisors (see below), whose sum is σ = 1584772561344. Its totient is φ = 415059480264.

The previous prime is 867851640583. The next prime is 867851640701. The reversal of 867851640644 is 446046158768.

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, 4716584912 + ... + 4716585095.

It is an arithmetic number, because the mean of its divisors is an integer number (132064380112).

Almost surely, 2^867851640644 is an apocalyptic number.

It is an amenable number.

867851640644 is a deficient number, since it is larger than the sum of its proper divisors (716920920700).

867851640644 is a wasteful number, since it uses less digits than its factorization.

867851640644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9433170034 (or 9433170032 counting only the distinct ones).

The product of its (nonzero) digits is 30965760, while the sum is 59.

The spelling of 867851640644 in words is "eight hundred sixty-seven billion, eight hundred fifty-one million, six hundred forty thousand, six hundred forty-four".