64540875767 has 8 divisors (see below), whose sum is σ = 64718045280. Its totient is φ = 64363904800.

The previous prime is 64540875739. The next prime is 64540875787. The reversal of 64540875767 is 76757804546.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64540875767 - 2⁶ = 64540875703 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 (64540875727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 613478 + ... + 710940.

It is an arithmetic number, because the mean of its divisors is an integer number (8089755660).

Almost surely, 2^64540875767 is an apocalyptic number.

64540875767 is a deficient number, since it is larger than the sum of its proper divisors (177169513).

64540875767 is a wasteful number, since it uses less digits than its factorization.

64540875767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99273.

The product of its (nonzero) digits is 39513600, while the sum is 59.

The spelling of 64540875767 in words is "sixty-four billion, five hundred forty million, eight hundred seventy-five thousand, seven hundred sixty-seven".