67640286496 has 24 divisors (see below), whose sum is σ = 133412997564. Its totient is φ = 33757620480.

The previous prime is 67640286481. The next prime is 67640286499. The reversal of 67640286496 is 69468204676.

It can be written as a sum of positive squares in 2 ways, for example, as 64974010000 + 2666276496 = 254900^2 + 51636^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 67640286496.

It is not an unprimeable number, because it can be changed into a prime (67640286499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1936255 + ... + 1970878.

Almost surely, 2^67640286496 is an apocalyptic number.

It is an amenable number.

67640286496 is a deficient number, since it is larger than the sum of its proper divisors (65772711068).

67640286496 is a wasteful number, since it uses less digits than its factorization.

67640286496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3907684 (or 3907676 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 58.

The spelling of 67640286496 in words is "sixty-seven billion, six hundred forty million, two hundred eighty-six thousand, four hundred ninety-six".