67143572640 has 144 divisors (see below), whose sum is σ = 242605614888. Its totient is φ = 16851714048.

The previous prime is 67143572621. The next prime is 67143572651. The reversal of 67143572640 is 4627534176.

67143572640 is a `hidden beast` number, since 6 + 7 + 14 + 3 + 572 + 64 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 67141101456 + 2471184 = 259116^2 + 1572^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1346917 + ... + 1395876.

Almost surely, 2^67143572640 is an apocalyptic number.

67143572640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

67143572640 is an abundant number, since it is smaller than the sum of its proper divisors (175462042248).

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

67143572640 is a wasteful number, since it uses less digits than its factorization.

67143572640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2742831 (or 2742820 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 67143572640 in words is "sixty-seven billion, one hundred forty-three million, five hundred seventy-two thousand, six hundred forty".