6986491538 has 8 divisors (see below), whose sum is σ = 11285870988. Its totient is φ = 3224534544.

The previous prime is 6986491511. The next prime is 6986491543. The reversal of 6986491538 is 8351946896.

It can be written as a sum of positive squares in 2 ways, for example, as 6817309489 + 169182049 = 82567^2 + 13007^2 .

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

It is a super-2 number, since 2×6986491538² = 97622128021091210888, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134355581 + ... + 134355632.

Almost surely, 2^6986491538 is an apocalyptic number.

6986491538 is a deficient number, since it is larger than the sum of its proper divisors (4299379450).

6986491538 is a wasteful number, since it uses less digits than its factorization.

6986491538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268711228.

The product of its digits is 11197440, while the sum is 59.

The square root of 6986491538 is about 83585.2351674624. The cubic root of 6986491538 is about 1911.6998780884.

The spelling of 6986491538 in words is "six billion, nine hundred eighty-six million, four hundred ninety-one thousand, five hundred thirty-eight".