190640995477 has 2 divisors, whose sum is σ = 190640995478. Its totient is φ = 190640995476.

The previous prime is 190640995463. The next prime is 190640995541. The reversal of 190640995477 is 774599046091.

190640995477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144471448836 + 46169546641 = 380094^2 + 214871^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190640995477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190640995427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95320497738 + 95320497739.

It is an arithmetic number, because the mean of its divisors is an integer number (95320497739).

Almost surely, 2^190640995477 is an apocalyptic number.

It is an amenable number.

190640995477 is a deficient number, since it is larger than the sum of its proper divisors (1).

190640995477 is an equidigital number, since it uses as much as digits as its factorization.

190640995477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17146080, while the sum is 61.

The spelling of 190640995477 in words is "one hundred ninety billion, six hundred forty million, nine hundred ninety-five thousand, four hundred seventy-seven".