135421513325320 has 32 divisors (see below), whose sum is σ = 314527385790720. Its totient is φ = 52421230964160.

The previous prime is 135421513325303. The next prime is 135421513325321. The reversal of 135421513325320 is 23523315124531.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (135421513325321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54605447682 + ... + 54605450161.

It is an arithmetic number, because the mean of its divisors is an integer number (9828980805960).

Almost surely, 2^{135421513325320} is an apocalyptic number.

135421513325320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135421513325320 is an abundant number, since it is smaller than the sum of its proper divisors (179105872465400).

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

135421513325320 is a wasteful number, since it uses less digits than its factorization.

135421513325320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109210897885 (or 109210897881 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 40.

Adding to 135421513325320 its reverse (23523315124531), we get a palindrome (158944828449851).

The spelling of 135421513325320 in words is "one hundred thirty-five trillion, four hundred twenty-one billion, five hundred thirteen million, three hundred twenty-five thousand, three hundred twenty".