264626401 has 4 divisors (see below), whose sum is σ = 284982292. Its totient is φ = 244270512.

The previous prime is 264626399. The next prime is 264626407. The reversal of 264626401 is 104626462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 104626462 = 2 ⋅52313231.

It can be written as a sum of positive squares in 2 ways, for example, as 36012001 + 228614400 = 6001^2 + 15120^2 .

It is a cyclic number.

It is not a de Polignac number, because 264626401 - 2¹ = 264626399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (264626407) 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, 10177926 + ... + 10177951.

It is an arithmetic number, because the mean of its divisors is an integer number (71245573).

Almost surely, 2^264626401 is an apocalyptic number.

It is an amenable number.

264626401 is a deficient number, since it is larger than the sum of its proper divisors (20355891).

264626401 is a wasteful number, since it uses less digits than its factorization.

264626401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20355890.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 264626401 is about 16267.3415467925. The cubic root of 264626401 is about 642.0138396618.

The spelling of 264626401 in words is "two hundred sixty-four million, six hundred twenty-six thousand, four hundred one".