135529880978 has 6 divisors (see below), whose sum is σ = 203295602421. Its totient is φ = 67764680172.

The previous prime is 135529880887. The next prime is 135529880999. The reversal of 135529880978 is 879088925531.

It can be written as a sum of positive squares in 2 ways, for example, as 102568389169 + 32961491809 = 320263^2 + 181553^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=260317.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 390476 + ... + 650792.

Almost surely, 2^135529880978 is an apocalyptic number.

135529880978 is a deficient number, since it is larger than the sum of its proper divisors (67765721443).

135529880978 is an frugal number, since it uses more digits than its factorization.

135529880978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520636 (or 260319 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 65.

The spelling of 135529880978 in words is "one hundred thirty-five billion, five hundred twenty-nine million, eight hundred eighty thousand, nine hundred seventy-eight".