671904815919 has 16 divisors (see below), whose sum is σ = 896688760320. Its totient is φ = 447528818880.

The previous prime is 671904815893. The next prime is 671904815929. The reversal of 671904815919 is 919518409176.

It is not a de Polignac number, because 671904815919 - 2¹⁹ = 671904291631 is a prime.

It is a super-2 number, since 2×671904815919² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671904815929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42704284 + ... + 42720014.

It is an arithmetic number, because the mean of its divisors is an integer number (56043047520).

Almost surely, 2^671904815919 is an apocalyptic number.

671904815919 is a deficient number, since it is larger than the sum of its proper divisors (224783944401).

671904815919 is a wasteful number, since it uses less digits than its factorization.

671904815919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27790.

The product of its (nonzero) digits is 4898880, while the sum is 60.

The spelling of 671904815919 in words is "six hundred seventy-one billion, nine hundred four million, eight hundred fifteen thousand, nine hundred nineteen".