445606796671491 has 128 divisors (see below), whose sum is σ = 745614002538496. Its totient is φ = 230453975162880.

The previous prime is 445606796671489. The next prime is 445606796671493. The reversal of 445606796671491 is 194176697606544.

It is an interprime number because it is at equal distance from previous prime (445606796671489) and next prime (445606796671493).

It is not a de Polignac number, because 445606796671491 - 2¹ = 445606796671489 is a prime.

It is a Smith number, since the sum of its digits (75) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (445606796671493) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 44150078841 + ... + 44150088933.

It is an arithmetic number, because the mean of its divisors is an integer number (5825109394832).

Almost surely, 2^{445606796671491} is an apocalyptic number.

445606796671491 is a deficient number, since it is larger than the sum of its proper divisors (300007205867005).

445606796671491 is a wasteful number, since it uses less digits than its factorization.

445606796671491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18381.

The product of its (nonzero) digits is 1646023680, while the sum is 75.

The spelling of 445606796671491 in words is "four hundred forty-five trillion, six hundred six billion, seven hundred ninety-six million, six hundred seventy-one thousand, four hundred ninety-one".