64560336261 has 8 divisors (see below), whose sum is σ = 88406947104. Its totient is φ = 41876974800.

The previous prime is 64560336257. The next prime is 64560336301. The reversal of 64560336261 is 16263306546.

It is a happy number.

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

It is not a de Polignac number, because 64560336261 - 2² = 64560336257 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64560336241) 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, 290812215 + ... + 290812436.

It is an arithmetic number, because the mean of its divisors is an integer number (11050868388).

Almost surely, 2^64560336261 is an apocalyptic number.

It is an amenable number.

64560336261 is a deficient number, since it is larger than the sum of its proper divisors (23846610843).

64560336261 is a wasteful number, since it uses less digits than its factorization.

64560336261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581624691.

The product of its (nonzero) digits is 466560, while the sum is 42.

The spelling of 64560336261 in words is "sixty-four billion, five hundred sixty million, three hundred thirty-six thousand, two hundred sixty-one".