64278940514872 has 16 divisors (see below), whose sum is σ = 124678979447400. Its totient is φ = 31031212662240.

The previous prime is 64278940514849. The next prime is 64278940514881. The reversal of 64278940514872 is 27841504987246.

It is a junction number, because it is equal to n+sod(n) for n = 64278940514798 and 64278940514807.

It is a congruent number.

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, 138532199154 + ... + 138532199617.

Almost surely, 2^{64278940514872} is an apocalyptic number.

It is an amenable number.

64278940514872 is a deficient number, since it is larger than the sum of its proper divisors (60400038932528).

64278940514872 is a wasteful number, since it uses less digits than its factorization.

64278940514872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277064398806 (or 277064398802 counting only the distinct ones).

The product of its (nonzero) digits is 216760320, while the sum is 67.

The spelling of 64278940514872 in words is "sixty-four trillion, two hundred seventy-eight billion, nine hundred forty million, five hundred fourteen thousand, eight hundred seventy-two".