190461274781 has 2 divisors, whose sum is σ = 190461274782. Its totient is φ = 190461274780.

The previous prime is 190461274769. The next prime is 190461274867. The reversal of 190461274781 is 187472164091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166389752281 + 24071522500 = 407909^2 + 155150^2 .

It is a cyclic number.

It is not a de Polignac number, because 190461274781 - 2¹⁰ = 190461273757 is a prime.

It is a super-2 number, since 2×190461274781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190461274181) 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 as a sum of consecutive naturals, namely, 95230637390 + 95230637391.

It is an arithmetic number, because the mean of its divisors is an integer number (95230637391).

Almost surely, 2^190461274781 is an apocalyptic number.

It is an amenable number.

190461274781 is a deficient number, since it is larger than the sum of its proper divisors (1).

190461274781 is an equidigital number, since it uses as much as digits as its factorization.

190461274781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 677376, while the sum is 50.

The spelling of 190461274781 in words is "one hundred ninety billion, four hundred sixty-one million, two hundred seventy-four thousand, seven hundred eighty-one".