1904549042917 has 16 divisors (see below), whose sum is σ = 1940998272048. Its totient is φ = 1868454604800.

The previous prime is 1904549042861. The next prime is 1904549042953. The reversal of 1904549042917 is 7192409454091.

It is a Cunningham number, because it is equal to 1380054²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 6411845476 + 1898137197441 = 80074^2 + 1377729^2 .

It is a cyclic number.

It is not a de Polignac number, because 1904549042917 - 2⁷ = 1904549042789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1904549042717) 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, 41897233 + ... + 41942665.

It is an arithmetic number, because the mean of its divisors is an integer number (121312392003).

Almost surely, 2^{1904549042917} is an apocalyptic number.

It is an amenable number.

1904549042917 is a deficient number, since it is larger than the sum of its proper divisors (36449229131).

1904549042917 is a wasteful number, since it uses less digits than its factorization.

1904549042917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49320.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 1904549042917 in words is "one trillion, nine hundred four billion, five hundred forty-nine million, forty-two thousand, nine hundred seventeen".