864692645 has 8 divisors (see below), whose sum is σ = 1037794680. Its totient is φ = 691645120.

The previous prime is 864692597. The next prime is 864692651. The reversal of 864692645 is 546296468.

It can be written as a sum of positive squares in 4 ways, for example, as 292478404 + 572214241 = 17102^2 + 23921^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 864692645 - 2¹⁴ = 864676261 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 864692593 and 864692602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41711 + ... + 58899.

It is an arithmetic number, because the mean of its divisors is an integer number (129724335).

Almost surely, 2^864692645 is an apocalyptic number.

It is an amenable number.

864692645 is a deficient number, since it is larger than the sum of its proper divisors (173102035).

864692645 is a wasteful number, since it uses less digits than its factorization.

864692645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27255.

The product of its digits is 2488320, while the sum is 50.

The square root of 864692645 is about 29405.6566837063. The cubic root of 864692645 is about 952.6950783379.

The spelling of 864692645 in words is "eight hundred sixty-four million, six hundred ninety-two thousand, six hundred forty-five".