65438631506268 has 36 divisors (see below), whose sum is σ = 168933772119840. Its totient is φ = 21348773398656.

The previous prime is 65438631506267. The next prime is 65438631506279. The reversal of 65438631506268 is 86260513683456.

65438631506268 is a `hidden beast` number, since 6 + 5 + 4 + 3 + 8 + 63 + 1 + 506 + 2 + 68 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65438631506263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19337655373 + ... + 19337658756.

Almost surely, 2^{65438631506268} is an apocalyptic number.

It is an amenable number.

65438631506268 is an abundant number, since it is smaller than the sum of its proper divisors (103495140613572).

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

65438631506268 is a wasteful number, since it uses less digits than its factorization.

65438631506268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38675314186 (or 38675314181 counting only the distinct ones).

The product of its (nonzero) digits is 149299200, while the sum is 63.

The spelling of 65438631506268 in words is "sixty-five trillion, four hundred thirty-eight billion, six hundred thirty-one million, five hundred six thousand, two hundred sixty-eight".