64188268105687 has 16 divisors (see below), whose sum is σ = 70720480006560. Its totient is φ = 57772267696000.

The previous prime is 64188268105679. The next prime is 64188268105699. The reversal of 64188268105687 is 78650186288146.

It is not a de Polignac number, because 64188268105687 - 2³ = 64188268105679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64188268105667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20430993 + ... + 23362405.

It is an arithmetic number, because the mean of its divisors is an integer number (4420030000410).

Almost surely, 2^{64188268105687} is an apocalyptic number.

64188268105687 is a deficient number, since it is larger than the sum of its proper divisors (6532211900873).

64188268105687 is a wasteful number, since it uses less digits than its factorization.

64188268105687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2951234.

The product of its (nonzero) digits is 247726080, while the sum is 70.

The spelling of 64188268105687 in words is "sixty-four trillion, one hundred eighty-eight billion, two hundred sixty-eight million, one hundred five thousand, six hundred eighty-seven".