6861812690 has 32 divisors (see below), whose sum is σ = 12675960000. Its totient is φ = 2673425088.

The previous prime is 6861812681. The next prime is 6861812693. The reversal of 6861812690 is 962181686.

It is a super-2 number, since 2×6861812690² = 94168946785290072200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6861812693) 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, 10961 + ... + 117659.

It is an arithmetic number, because the mean of its divisors is an integer number (396123750).

Almost surely, 2^6861812690 is an apocalyptic number.

6861812690 is a deficient number, since it is larger than the sum of its proper divisors (5814147310).

6861812690 is a wasteful number, since it uses less digits than its factorization.

6861812690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106874.

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 6861812690 is about 82836.0591167880. The cubic root of 6861812690 is about 1900.2596773424.

The spelling of 6861812690 in words is "six billion, eight hundred sixty-one million, eight hundred twelve thousand, six hundred ninety".