2161598041786 has 8 divisors (see below), whose sum is σ = 3317801645664. Its totient is φ = 1055664159900.

The previous prime is 2161598041781. The next prime is 2161598041793. The reversal of 2161598041786 is 6871408951612.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2161598041786.

It is not an unprimeable number, because it can be changed into a prime (2161598041781) 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, 12567430390 + ... + 12567430561.

It is an arithmetic number, because the mean of its divisors is an integer number (414725205708).

Almost surely, 2^{2161598041786} is an apocalyptic number.

2161598041786 is a deficient number, since it is larger than the sum of its proper divisors (1156203603878).

2161598041786 is a wasteful number, since it uses less digits than its factorization.

2161598041786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25134860996.

The product of its (nonzero) digits is 5806080, while the sum is 58.

The spelling of 2161598041786 in words is "two trillion, one hundred sixty-one billion, five hundred ninety-eight million, forty-one thousand, seven hundred eighty-six".