7864500009 has 16 divisors (see below), whose sum is σ = 10947916800. Its totient is φ = 5012291856.

The previous prime is 7864500001. The next prime is 7864500011. The reversal of 7864500009 is 9000054687.

It is not a de Polignac number, because 7864500009 - 2³ = 7864500001 is a prime.

It is a super-2 number, since 2×7864500009² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7864500009.

It is not an unprimeable number, because it can be changed into a prime (7864500001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99322 + ... + 159980.

It is an arithmetic number, because the mean of its divisors is an integer number (684244800).

Almost surely, 2^7864500009 is an apocalyptic number.

It is an amenable number.

7864500009 is a deficient number, since it is larger than the sum of its proper divisors (3083416791).

7864500009 is a wasteful number, since it uses less digits than its factorization.

7864500009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62564.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 7864500009 is about 88682.0162659826. The cubic root of 7864500009 is about 1988.6439764870.

The spelling of 7864500009 in words is "seven billion, eight hundred sixty-four million, five hundred thousand, nine".