64367643261 has 8 divisors (see below), whose sum is σ = 85836817120. Its totient is φ = 42905115792.

The previous prime is 64367643253. The next prime is 64367643317. The reversal of 64367643261 is 16234676346.

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

It is not a de Polignac number, because 64367643261 - 2³ = 64367643253 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64367643261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64367644261) 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, 1638955 + ... + 1677768.

It is an arithmetic number, because the mean of its divisors is an integer number (10729602140).

Almost surely, 2^64367643261 is an apocalyptic number.

It is an amenable number.

64367643261 is a deficient number, since it is larger than the sum of its proper divisors (21469173859).

64367643261 is a wasteful number, since it uses less digits than its factorization.

64367643261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3323195.

The product of its digits is 2612736, while the sum is 48.

The spelling of 64367643261 in words is "sixty-four billion, three hundred sixty-seven million, six hundred forty-three thousand, two hundred sixty-one".