133801278320 has 20 divisors (see below), whose sum is σ = 311087972280. Its totient is φ = 53520511296.

The previous prime is 133801278271. The next prime is 133801278341. The reversal of 133801278320 is 23872108331.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×133801278320² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 836257910 + ... + 836258069.

It is an arithmetic number, because the mean of its divisors is an integer number (15554398614).

Almost surely, 2^133801278320 is an apocalyptic number.

133801278320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133801278320 is an abundant number, since it is smaller than the sum of its proper divisors (177286693960).

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

133801278320 is a wasteful number, since it uses less digits than its factorization.

133801278320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672515992 (or 1672515986 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 133801278320 in words is "one hundred thirty-three billion, eight hundred one million, two hundred seventy-eight thousand, three hundred twenty".