264407217691 has 2 divisors, whose sum is σ = 264407217692. Its totient is φ = 264407217690.

The previous prime is 264407217673. The next prime is 264407217757. The reversal of 264407217691 is 196712704462.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 264407217691 - 2¹¹ = 264407215643 is a prime.

It is a super-2 number, since 2×264407217691² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (264407217671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132203608845 + 132203608846.

It is an arithmetic number, because the mean of its divisors is an integer number (132203608846).

Almost surely, 2^264407217691 is an apocalyptic number.

264407217691 is a deficient number, since it is larger than the sum of its proper divisors (1).

264407217691 is an equidigital number, since it uses as much as digits as its factorization.

264407217691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 264407217691 in words is "two hundred sixty-four billion, four hundred seven million, two hundred seventeen thousand, six hundred ninety-one".