190206504491 has 2 divisors, whose sum is σ = 190206504492. Its totient is φ = 190206504490.

The previous prime is 190206504479. The next prime is 190206504601. The reversal of 190206504491 is 194405602091.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190206504491 is a prime.

It is not a weakly prime, because it can be changed into another prime (190206504431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95103252245 + 95103252246.

It is an arithmetic number, because the mean of its divisors is an integer number (95103252246).

Almost surely, 2^190206504491 is an apocalyptic number.

190206504491 is a deficient number, since it is larger than the sum of its proper divisors (1).

190206504491 is an equidigital number, since it uses as much as digits as its factorization.

190206504491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 190206504491 in words is "one hundred ninety billion, two hundred six million, five hundred four thousand, four hundred ninety-one".