1916899691904 has 96 divisors (see below), whose sum is σ = 5706288244800. Its totient is φ = 616933223424.

The previous prime is 1916899691881. The next prime is 1916899691909. The reversal of 1916899691904 is 4091969986191.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1916899691909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28655824 + ... + 28722639.

It is an arithmetic number, because the mean of its divisors is an integer number (59440502550).

Almost surely, 2^{1916899691904} is an apocalyptic number.

It is an amenable number.

1916899691904 is an abundant number, since it is smaller than the sum of its proper divisors (3789388552896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1916899691904 is a wasteful number, since it uses less digits than its factorization.

1916899691904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57378512 (or 57378497 counting only the distinct ones).

The product of its (nonzero) digits is 68024448, while the sum is 72.

The spelling of 1916899691904 in words is "one trillion, nine hundred sixteen billion, eight hundred ninety-nine million, six hundred ninety-one thousand, nine hundred four".