67817801872 has 10 divisors (see below), whose sum is σ = 131396991158. Its totient is φ = 33908900928.

The previous prime is 67817801819. The next prime is 67817801879. The reversal of 67817801872 is 27810871876.

It can be written as a sum of positive squares in only one way, i.e., 55731877776 + 12085924096 = 236076^2 + 109936^2 .

It is not an unprimeable number, because it can be changed into a prime (67817801879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2119306293 + ... + 2119306324.

Almost surely, 2^67817801872 is an apocalyptic number.

It is an amenable number.

67817801872 is a deficient number, since it is larger than the sum of its proper divisors (63579189286).

67817801872 is a wasteful number, since it uses less digits than its factorization.

67817801872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4238612625 (or 4238612619 counting only the distinct ones).

The product of its (nonzero) digits is 2107392, while the sum is 55.

The spelling of 67817801872 in words is "sixty-seven billion, eight hundred seventeen million, eight hundred one thousand, eight hundred seventy-two".