64567265261 has 8 divisors (see below), whose sum is σ = 67970083200. Its totient is φ = 61164901440.

The previous prime is 64567265239. The next prime is 64567265263. The reversal of 64567265261 is 16256276546.

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 64567265261 - 2¹⁸ = 64567003117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64567265263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200645 + ... + 411573.

It is an arithmetic number, because the mean of its divisors is an integer number (8496260400).

Almost surely, 2^64567265261 is an apocalyptic number.

It is an amenable number.

64567265261 is a deficient number, since it is larger than the sum of its proper divisors (3402817939).

64567265261 is a wasteful number, since it uses less digits than its factorization.

64567265261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227059.

The product of its digits is 3628800, while the sum is 50.

The spelling of 64567265261 in words is "sixty-four billion, five hundred sixty-seven million, two hundred sixty-five thousand, two hundred sixty-one".