7861072209 has 8 divisors (see below), whose sum is σ = 10486859712. Its totient is φ = 5237999760.

The previous prime is 7861072159. The next prime is 7861072213. The reversal of 7861072209 is 9022701687.

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

It is not a de Polignac number, because 7861072209 - 2²⁵ = 7827517777 is a prime.

It is a super-2 number, since 2×7861072209² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7861072249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 671997 + ... + 683594.

It is an arithmetic number, because the mean of its divisors is an integer number (1310857464).

Almost surely, 2^7861072209 is an apocalyptic number.

It is an amenable number.

7861072209 is a deficient number, since it is larger than the sum of its proper divisors (2625787503).

7861072209 is a wasteful number, since it uses less digits than its factorization.

7861072209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357527.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 7861072209 is about 88662.6878060890. The cubic root of 7861072209 is about 1988.3550128140.

The spelling of 7861072209 in words is "seven billion, eight hundred sixty-one million, seventy-two thousand, two hundred nine".