2142171990665 has 8 divisors (see below), whose sum is σ = 2937835872960. Its totient is φ = 1468917936432.

The previous prime is 2142171990583. The next prime is 2142171990671. The reversal of 2142171990665 is 5660991712412.

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

It is a cyclic number.

It is not a de Polignac number, because 2142171990665 - 2²² = 2142167796361 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30602456975 + ... + 30602457044.

It is an arithmetic number, because the mean of its divisors is an integer number (367229484120).

Almost surely, 2^{2142171990665} is an apocalyptic number.

It is an amenable number.

2142171990665 is a deficient number, since it is larger than the sum of its proper divisors (795663882295).

2142171990665 is an equidigital number, since it uses as much as digits as its factorization.

2142171990665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61204914031.

The product of its (nonzero) digits is 1632960, while the sum is 53.

The spelling of 2142171990665 in words is "two trillion, one hundred forty-two billion, one hundred seventy-one million, nine hundred ninety thousand, six hundred sixty-five".