135803839649 has 2 divisors, whose sum is σ = 135803839650. Its totient is φ = 135803839648.

The previous prime is 135803839631. The next prime is 135803839657. The reversal of 135803839649 is 946938308531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135742138624 + 61701025 = 368432^2 + 7855^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135803839649 is a prime.

It is a super-2 number, since 2×135803839649² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (135803839679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67901919824 + 67901919825.

It is an arithmetic number, because the mean of its divisors is an integer number (67901919825).

Almost surely, 2^135803839649 is an apocalyptic number.

It is an amenable number.

135803839649 is a deficient number, since it is larger than the sum of its proper divisors (1).

135803839649 is an equidigital number, since it uses as much as digits as its factorization.

135803839649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16796160, while the sum is 59.

The spelling of 135803839649 in words is "one hundred thirty-five billion, eight hundred three million, eight hundred thirty-nine thousand, six hundred forty-nine".