864501671619601 has 32 divisors (see below), whose sum is σ = 949952634854400. Its totient is φ = 783774158618880.

The previous prime is 864501671619541. The next prime is 864501671619613. The reversal of 864501671619601 is 106916176105468.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 864501671619601 - 2²³ = 864501663230993 is a prime.

It is a super-3 number, since 3×864501671619601³ (a number of 46 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is a self number, because there is not a number n which added to its sum of digits gives 864501671619601.

It is not an unprimeable number, because it can be changed into a prime (864501671619671) 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, 1210187136 + ... + 1210901278.

It is an arithmetic number, because the mean of its divisors is an integer number (29686019839200).

Almost surely, 2^{864501671619601} is an apocalyptic number.

It is an amenable number.

864501671619601 is a deficient number, since it is larger than the sum of its proper divisors (85450963234799).

864501671619601 is a wasteful number, since it uses less digits than its factorization.

864501671619601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742489.

The product of its (nonzero) digits is 13063680, while the sum is 61.

The spelling of 864501671619601 in words is "eight hundred sixty-four trillion, five hundred one billion, six hundred seventy-one million, six hundred nineteen thousand, six hundred one".