106989781186 has 4 divisors (see below), whose sum is σ = 160484671782. Its totient is φ = 53494890592.

The previous prime is 106989781177. The next prime is 106989781211. The reversal of 106989781186 is 681187989601.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 98793919225 + 8195861961 = 314315^2 + 90531^2 .

It is a super-2 number, since 2×106989781186² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26747445295 + ... + 26747445298.

Almost surely, 2^106989781186 is an apocalyptic number.

106989781186 is a deficient number, since it is larger than the sum of its proper divisors (53494890596).

106989781186 is an equidigital number, since it uses as much as digits as its factorization.

106989781186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53494890595.

The product of its (nonzero) digits is 10450944, while the sum is 64.

The spelling of 106989781186 in words is "one hundred six billion, nine hundred eighty-nine million, seven hundred eighty-one thousand, one hundred eighty-six".