264401277893 has 2 divisors, whose sum is σ = 264401277894. Its totient is φ = 264401277892.

The previous prime is 264401277883. The next prime is 264401277989. The reversal of 264401277893 is 398772104462.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197969823844 + 66431454049 = 444938^2 + 257743^2 .

It is a cyclic number.

It is not a de Polignac number, because 264401277893 - 2¹⁰ = 264401276869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264401277823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132200638946 + 132200638947.

It is an arithmetic number, because the mean of its divisors is an integer number (132200638947).

Almost surely, 2^264401277893 is an apocalyptic number.

It is an amenable number.

264401277893 is a deficient number, since it is larger than the sum of its proper divisors (1).

264401277893 is an equidigital number, since it uses as much as digits as its factorization.

264401277893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4064256, while the sum is 53.

The spelling of 264401277893 in words is "two hundred sixty-four billion, four hundred one million, two hundred seventy-seven thousand, eight hundred ninety-three".