1894665157 has 16 divisors (see below), whose sum is σ = 2384266752. Its totient is φ = 1462558320.

The previous prime is 1894665139. The next prime is 1894665169. The reversal of 1894665157 is 7515664981.

It is a cyclic number.

It is not a de Polignac number, because 1894665157 - 2²³ = 1886276549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1894665107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106743 + ... + 123220.

It is an arithmetic number, because the mean of its divisors is an integer number (149016672).

Almost surely, 2^1894665157 is an apocalyptic number.

It is an amenable number.

1894665157 is a deficient number, since it is larger than the sum of its proper divisors (489601595).

1894665157 is a wasteful number, since it uses less digits than its factorization.

1894665157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230088.

The product of its digits is 1814400, while the sum is 52.

The square root of 1894665157 is about 43527.7515729908. The cubic root of 1894665157 is about 1237.4020262129.

The spelling of 1894665157 in words is "one billion, eight hundred ninety-four million, six hundred sixty-five thousand, one hundred fifty-seven".