1691101313873 has 4 divisors (see below), whose sum is σ = 1691252708208. Its totient is φ = 1690949919540.

The previous prime is 1691101313831. The next prime is 1691101313927. The reversal of 1691101313873 is 3783131011961.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1691101313873 - 2⁶ = 1691101313809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1691101313273) 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, 75680411 + ... + 75702752.

It is an arithmetic number, because the mean of its divisors is an integer number (422813177052).

Almost surely, 2^{1691101313873} is an apocalyptic number.

It is an amenable number.

1691101313873 is a deficient number, since it is larger than the sum of its proper divisors (151394335).

1691101313873 is a wasteful number, since it uses less digits than its factorization.

1691101313873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151394334.

The product of its (nonzero) digits is 81648, while the sum is 44.

The spelling of 1691101313873 in words is "one trillion, six hundred ninety-one billion, one hundred one million, three hundred thirteen thousand, eight hundred seventy-three".