67128025344 has 36 divisors (see below), whose sum is σ = 178658444496. Its totient is φ = 22376008192.

The previous prime is 67128025339. The next prime is 67128025387. The reversal of 67128025344 is 44352082176.

It is a junction number, because it is equal to n+sod(n) for n = 67128025296 and 67128025305.

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, 43702374 + ... + 43703909.

Almost surely, 2^67128025344 is an apocalyptic number.

67128025344 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

67128025344 is an abundant number, since it is smaller than the sum of its proper divisors (111530419152).

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

67128025344 is an equidigital number, since it uses as much as digits as its factorization.

67128025344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87406302 (or 87406288 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The spelling of 67128025344 in words is "sixty-seven billion, one hundred twenty-eight million, twenty-five thousand, three hundred forty-four".