626045261 has 4 divisors (see below), whose sum is σ = 626619132. Its totient is φ = 625471392.

The previous prime is 626045249. The next prime is 626045263. The reversal of 626045261 is 162540626.

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 563160361 + 62884900 = 23731^2 + 7930^2 .

It is a cyclic number.

It is not a de Polignac number, because 626045261 - 2¹⁸ = 625783117 is a prime.

It is a super-4 number, since 4×626045261⁴ (a number of 36 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (626045263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285296 + ... + 287481.

It is an arithmetic number, because the mean of its divisors is an integer number (156654783).

Almost surely, 2^626045261 is an apocalyptic number.

It is an amenable number.

626045261 is a deficient number, since it is larger than the sum of its proper divisors (573871).

626045261 is a wasteful number, since it uses less digits than its factorization.

626045261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 573870.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 626045261 is about 25020.8964867368. The cubic root of 626045261 is about 855.4643401870.

Adding to 626045261 its reverse (162540626), we get a palindrome (788585887).

The spelling of 626045261 in words is "six hundred twenty-six million, forty-five thousand, two hundred sixty-one".