419851997791 has 4 divisors (see below), whose sum is σ = 420560011872. Its totient is φ = 419143983712.

The previous prime is 419851997737. The next prime is 419851997833. The reversal of 419851997791 is 197799158914.

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

It is a cyclic number.

It is not a de Polignac number, because 419851997791 - 2¹⁵ = 419851965023 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 419851997791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (419851991791) 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, 354006151 + ... + 354007336.

It is an arithmetic number, because the mean of its divisors is an integer number (105140002968).

Almost surely, 2^419851997791 is an apocalyptic number.

419851997791 is a deficient number, since it is larger than the sum of its proper divisors (708014081).

419851997791 is an equidigital number, since it uses as much as digits as its factorization.

419851997791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708014080.

The product of its digits is 51438240, while the sum is 70.

The spelling of 419851997791 in words is "four hundred nineteen billion, eight hundred fifty-one million, nine hundred ninety-seven thousand, seven hundred ninety-one".