133878716440 has 32 divisors (see below), whose sum is σ = 344259557280. Its totient is φ = 45901274112.

The previous prime is 133878716437. The next prime is 133878716443. The reversal of 133878716440 is 44617878331.

It is an interprime number because it is at equal distance from previous prime (133878716437) and next prime (133878716443).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133878716443) 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, 239068857 + ... + 239069416.

It is an arithmetic number, because the mean of its divisors is an integer number (10758111165).

Almost surely, 2^133878716440 is an apocalyptic number.

133878716440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133878716440 is an abundant number, since it is smaller than the sum of its proper divisors (210380840840).

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

133878716440 is a wasteful number, since it uses less digits than its factorization.

133878716440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478138291 (or 478138287 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 52.

The spelling of 133878716440 in words is "one hundred thirty-three billion, eight hundred seventy-eight million, seven hundred sixteen thousand, four hundred forty".