67253574640 has 80 divisors (see below), whose sum is σ = 182504604672. Its totient is φ = 22567756032.

The previous prime is 67253574611. The next prime is 67253574653. The reversal of 67253574640 is 4647535276.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×67253574640² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1251294 + ... + 1303933.

Almost surely, 2^67253574640 is an apocalyptic number.

It is an amenable number.

67253574640 is an abundant number, since it is smaller than the sum of its proper divisors (115251030032).

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

67253574640 is a wasteful number, since it uses less digits than its factorization.

67253574640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2555294 (or 2555288 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 49.

The spelling of 67253574640 in words is "sixty-seven billion, two hundred fifty-three million, five hundred seventy-four thousand, six hundred forty".