1678197377099 has 4 divisors (see below), whose sum is σ = 1678294282440. Its totient is φ = 1678100471760.

The previous prime is 1678197377093. The next prime is 1678197377113. The reversal of 1678197377099 is 9907737918761.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1678197377099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1678197377093) 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, 48426689 + ... + 48461330.

It is an arithmetic number, because the mean of its divisors is an integer number (419573570610).

Almost surely, 2^{1678197377099} is an apocalyptic number.

1678197377099 is a deficient number, since it is larger than the sum of its proper divisors (96905341).

1678197377099 is an equidigital number, since it uses as much as digits as its factorization.

1678197377099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96905340.

The product of its (nonzero) digits is 252047376, while the sum is 74.

The spelling of 1678197377099 in words is "one trillion, six hundred seventy-eight billion, one hundred ninety-seven million, three hundred seventy-seven thousand, ninety-nine".