6851297502 has 144 divisors (see below), whose sum is σ = 17946545760. Its totient is φ = 1881242496.

The previous prime is 6851297471. The next prime is 6851297513. The reversal of 6851297502 is 2057921586.

6851297502 is a `hidden beast` number, since 6 + 8 + 51 + 2 + 97 + 502 = 666.

It is a super-3 number, since 3×6851297502³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 7084623 + ... + 7085589.

It is an arithmetic number, because the mean of its divisors is an integer number (124628790).

Almost surely, 2^6851297502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6851297502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8973272880).

6851297502 is an abundant number, since it is smaller than the sum of its proper divisors (11095248258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6851297502 is a wasteful number, since it uses less digits than its factorization.

6851297502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295 (or 1285 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 6851297502 is about 82772.5649113280. The cubic root of 6851297502 is about 1899.2885149545.

The spelling of 6851297502 in words is "six billion, eight hundred fifty-one million, two hundred ninety-seven thousand, five hundred two".