8102785207 has 24 divisors (see below), whose sum is σ = 9311702400. Its totient is φ = 7032181200.

The previous prime is 8102785183. The next prime is 8102785219. The reversal of 8102785207 is 7025872018.

It is not a de Polignac number, because 8102785207 - 2⁷ = 8102785079 is a prime.

It is a super-2 number, since 2×8102785207² (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 8102785207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8102785907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1586544 + ... + 1591642.

It is an arithmetic number, because the mean of its divisors is an integer number (387987600).

Almost surely, 2^8102785207 is an apocalyptic number.

8102785207 is a deficient number, since it is larger than the sum of its proper divisors (1208917193).

8102785207 is a wasteful number, since it uses less digits than its factorization.

8102785207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5715 (or 5704 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 8102785207 is about 90015.4720423106. The cubic root of 8102785207 is about 2008.5290102062.

The spelling of 8102785207 in words is "eight billion, one hundred two million, seven hundred eighty-five thousand, two hundred seven".