135982748649 has 96 divisors (see below), whose sum is σ = 217980743680. Its totient is φ = 75057840000.

The previous prime is 135982748647. The next prime is 135982748659. The reversal of 135982748649 is 946847289531.

It is a happy number.

It is not a de Polignac number, because 135982748649 - 2¹ = 135982748647 is a prime.

It is a super-2 number, since 2×135982748649² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 135982748649.

It is not an unprimeable number, because it can be changed into a prime (135982748647) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 33565674 + ... + 33569724.

Almost surely, 2^135982748649 is an apocalyptic number.

135982748649 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

135982748649 is a deficient number, since it is larger than the sum of its proper divisors (81997995031).

135982748649 is a wasteful number, since it uses less digits than its factorization.

135982748649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4283 (or 4272 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 66.

The spelling of 135982748649 in words is "one hundred thirty-five billion, nine hundred eighty-two million, seven hundred forty-eight thousand, six hundred forty-nine".