2045555389 has 2 divisors, whose sum is σ = 2045555390. Its totient is φ = 2045555388.

The previous prime is 2045555387. The next prime is 2045555417. The reversal of 2045555389 is 9835555402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1985415364 + 60140025 = 44558^2 + 7755^2 .

It is a cyclic number.

It is not a de Polignac number, because 2045555389 - 2¹ = 2045555387 is a prime.

Together with 2045555387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2045555381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1022777694 + 1022777695.

It is an arithmetic number, because the mean of its divisors is an integer number (1022777695).

Almost surely, 2^2045555389 is an apocalyptic number.

It is an amenable number.

2045555389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2045555389 is an equidigital number, since it uses as much as digits as its factorization.

2045555389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080000, while the sum is 46.

The square root of 2045555389 is about 45227.8165402665. The cubic root of 2045555389 is about 1269.4153567926.

The spelling of 2045555389 in words is "two billion, forty-five million, five hundred fifty-five thousand, three hundred eighty-nine".