190749254838521 has 2 divisors, whose sum is σ = 190749254838522. Its totient is φ = 190749254838520.

The previous prime is 190749254838503. The next prime is 190749254838529. The reversal of 190749254838521 is 125838452947091.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190164237900025 + 585016938496 = 13790005^2 + 764864^2 .

It is an emirp because it is prime and its reverse (125838452947091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 190749254838521 - 2⁴⁶ = 120380510660857 is a prime.

It is not a weakly prime, because it can be changed into another prime (190749254838529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95374627419260 + 95374627419261.

It is an arithmetic number, because the mean of its divisors is an integer number (95374627419261).

Almost surely, 2^{190749254838521} is an apocalyptic number.

It is an amenable number.

190749254838521 is a deficient number, since it is larger than the sum of its proper divisors (1).

190749254838521 is an equidigital number, since it uses as much as digits as its factorization.

190749254838521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174182400, while the sum is 68.

The spelling of 190749254838521 in words is "one hundred ninety trillion, seven hundred forty-nine billion, two hundred fifty-four million, eight hundred thirty-eight thousand, five hundred twenty-one".