135251206320 has 40 divisors (see below), whose sum is σ = 419278740336. Its totient is φ = 36066988288.

The previous prime is 135251206291. The next prime is 135251206379. The reversal of 135251206320 is 23602152531.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×135251206320² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281773107 + ... + 281773586.

Almost surely, 2^135251206320 is an apocalyptic number.

135251206320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135251206320 is an abundant number, since it is smaller than the sum of its proper divisors (284027534016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135251206320 is a wasteful number, since it uses less digits than its factorization.

135251206320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563546709 (or 563546703 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 135251206320 its reverse (23602152531), we get a palindrome (158853358851).

The spelling of 135251206320 in words is "one hundred thirty-five billion, two hundred fifty-one million, two hundred six thousand, three hundred twenty".