71900380186 has 8 divisors (see below), whose sum is σ = 107863008660. Its totient is φ = 35946043968.

The previous prime is 71900380147. The next prime is 71900380187. The reversal of 71900380186 is 68108300917.

It can be written as a sum of positive squares in 2 ways, for example, as 53231256961 + 18669123225 = 230719^2 + 136635^2 .

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

It is not an unprimeable number, because it can be changed into a prime (71900380187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2051341 + ... + 2086096.

Almost surely, 2^71900380186 is an apocalyptic number.

71900380186 is a deficient number, since it is larger than the sum of its proper divisors (35962628474).

71900380186 is a wasteful number, since it uses less digits than its factorization.

71900380186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4146128.

The product of its (nonzero) digits is 72576, while the sum is 43.

The spelling of 71900380186 in words is "seventy-one billion, nine hundred million, three hundred eighty thousand, one hundred eighty-six".