6820787536 has 10 divisors (see below), whose sum is σ = 13215275882. Its totient is φ = 3410393760.

The previous prime is 6820787527. The next prime is 6820787573. The reversal of 6820787536 is 6357870286.

It can be written as a sum of positive squares in only one way, i.e., 5469489936 + 1351297600 = 73956^2 + 36760^2 .

It is a super-2 number, since 2×6820787536² = 93046285222505902592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213149595 + ... + 213149626.

Almost surely, 2^6820787536 is an apocalyptic number.

It is an amenable number.

6820787536 is a deficient number, since it is larger than the sum of its proper divisors (6394488346).

6820787536 is a wasteful number, since it uses less digits than its factorization.

6820787536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426299229 (or 426299223 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 52.

The square root of 6820787536 is about 82588.0592821989. The cubic root of 6820787536 is about 1896.4650372290.

The spelling of 6820787536 in words is "six billion, eight hundred twenty million, seven hundred eighty-seven thousand, five hundred thirty-six".