135291387928 has 32 divisors (see below), whose sum is σ = 255176948160. Its totient is φ = 67245384960.

The previous prime is 135291387901. The next prime is 135291387961. The reversal of 135291387928 is 829783192531.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 845358 + ... + 992578.

It is an arithmetic number, because the mean of its divisors is an integer number (7974279630).

Almost surely, 2^135291387928 is an apocalyptic number.

It is an amenable number.

135291387928 is a deficient number, since it is larger than the sum of its proper divisors (119885560232).

135291387928 is a wasteful number, since it uses less digits than its factorization.

135291387928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147907 (or 147903 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 58.

The spelling of 135291387928 in words is "one hundred thirty-five billion, two hundred ninety-one million, three hundred eighty-seven thousand, nine hundred twenty-eight".