2161073786 has 8 divisors (see below), whose sum is σ = 3249348480. Its totient is φ = 1077957628.

The previous prime is 2161073777. The next prime is 2161073809. The reversal of 2161073786 is 6873701612.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1288586 + ... + 1290261.

It is an arithmetic number, because the mean of its divisors is an integer number (406168560).

Almost surely, 2^2161073786 is an apocalyptic number.

2161073786 is a deficient number, since it is larger than the sum of its proper divisors (1088274694).

2161073786 is a wasteful number, since it uses less digits than its factorization.

2161073786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2579268.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 2161073786 is about 46487.3508171847. The cubic root of 2161073786 is about 1292.8749824048.

The spelling of 2161073786 in words is "two billion, one hundred sixty-one million, seventy-three thousand, seven hundred eighty-six".