864502378645 has 16 divisors (see below), whose sum is σ = 1041724643328. Its totient is φ = 688722186240.

The previous prime is 864502378639. The next prime is 864502378759. The reversal of 864502378645 is 546873205468.

It is not a de Polignac number, because 864502378645 - 2⁵ = 864502378613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 864502378645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4698940 + ... + 4879450.

It is an arithmetic number, because the mean of its divisors is an integer number (65107790208).

Almost surely, 2^864502378645 is an apocalyptic number.

It is an amenable number.

864502378645 is a deficient number, since it is larger than the sum of its proper divisors (177222264683).

864502378645 is a wasteful number, since it uses less digits than its factorization.

864502378645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184500.

The product of its (nonzero) digits is 38707200, while the sum is 58.

The spelling of 864502378645 in words is "eight hundred sixty-four billion, five hundred two million, three hundred seventy-eight thousand, six hundred forty-five".