190945043557 has 2 divisors, whose sum is σ = 190945043558. Its totient is φ = 190945043556.

The previous prime is 190945043507. The next prime is 190945043593. The reversal of 190945043557 is 755340549091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170602867681 + 20342175876 = 413041^2 + 142626^2 .

It is a cyclic number.

It is not a de Polignac number, because 190945043557 - 2³⁵ = 156585305189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190945043507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95472521778 + 95472521779.

It is an arithmetic number, because the mean of its divisors is an integer number (95472521779).

Almost surely, 2^190945043557 is an apocalyptic number.

It is an amenable number.

190945043557 is a deficient number, since it is larger than the sum of its proper divisors (1).

190945043557 is an equidigital number, since it uses as much as digits as its factorization.

190945043557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402000, while the sum is 52.

The spelling of 190945043557 in words is "one hundred ninety billion, nine hundred forty-five million, forty-three thousand, five hundred fifty-seven".