136930191649 has 2 divisors, whose sum is σ = 136930191650. Its totient is φ = 136930191648.

The previous prime is 136930191647. The next prime is 136930191653. The reversal of 136930191649 is 946191039631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82667750400 + 54262441249 = 287520^2 + 232943^2 .

It is a cyclic number.

It is not a de Polignac number, because 136930191649 - 2¹ = 136930191647 is a prime.

Together with 136930191647, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 136930191596 and 136930191605.

It is not a weakly prime, because it can be changed into another prime (136930191641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68465095824 + 68465095825.

It is an arithmetic number, because the mean of its divisors is an integer number (68465095825).

Almost surely, 2^136930191649 is an apocalyptic number.

It is an amenable number.

136930191649 is a deficient number, since it is larger than the sum of its proper divisors (1).

136930191649 is an equidigital number, since it uses as much as digits as its factorization.

136930191649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 944784, while the sum is 52.

The spelling of 136930191649 in words is "one hundred thirty-six billion, nine hundred thirty million, one hundred ninety-one thousand, six hundred forty-nine".