264278370361 has 4 divisors (see below), whose sum is σ = 268610802724. Its totient is φ = 259945938000.

The previous prime is 264278370353. The next prime is 264278370373. The reversal of 264278370361 is 163073872462.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 37077428025 + 227200942336 = 192555^2 + 476656^2 .

It is a cyclic number.

It is not a de Polignac number, because 264278370361 - 2³ = 264278370353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (264278370341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2166216090 + ... + 2166216211.

It is an arithmetic number, because the mean of its divisors is an integer number (67152700681).

Almost surely, 2^264278370361 is an apocalyptic number.

It is an amenable number.

264278370361 is a deficient number, since it is larger than the sum of its proper divisors (4332432363).

264278370361 is an equidigital number, since it uses as much as digits as its factorization.

264278370361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4332432362.

The product of its (nonzero) digits is 2032128, while the sum is 49.

The spelling of 264278370361 in words is "two hundred sixty-four billion, two hundred seventy-eight million, three hundred seventy thousand, three hundred sixty-one".