4194665540642 has 4 divisors (see below), whose sum is σ = 6291998310966. Its totient is φ = 2097332770320.

The previous prime is 4194665540633. The next prime is 4194665540677. The reversal of 4194665540642 is 2460455664914.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3670983192361 + 523682348281 = 1915981^2 + 723659^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1048666385159 + ... + 1048666385162.

Almost surely, 2^{4194665540642} is an apocalyptic number.

4194665540642 is a deficient number, since it is larger than the sum of its proper divisors (2097332770324).

4194665540642 is a wasteful number, since it uses less digits than its factorization.

4194665540642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2097332770323.

The product of its (nonzero) digits is 24883200, while the sum is 56.

The spelling of 4194665540642 in words is "four trillion, one hundred ninety-four billion, six hundred sixty-five million, five hundred forty thousand, six hundred forty-two".