1661501782162 has 8 divisors (see below), whose sum is σ = 2492260609392. Its totient is φ = 830748245700.

The previous prime is 1661501782159. The next prime is 1661501782169. The reversal of 1661501782162 is 2612871051661.

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 (1661501782169) 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, 412264 + ... + 1868947.

It is an arithmetic number, because the mean of its divisors is an integer number (311532576174).

Almost surely, 2^{1661501782162} is an apocalyptic number.

1661501782162 is a deficient number, since it is larger than the sum of its proper divisors (830758827230).

1661501782162 is a wasteful number, since it uses less digits than its factorization.

1661501782162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2645384.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 1661501782162 in words is "one trillion, six hundred sixty-one billion, five hundred one million, seven hundred eighty-two thousand, one hundred sixty-two".