637226045 has 16 divisors (see below), whose sum is σ = 815576688. Its totient is φ = 476282880.

The previous prime is 637226041. The next prime is 637226089. The reversal of 637226045 is 540622736.

It can be written as a sum of positive squares in 8 ways, for example, as 34916281 + 602309764 = 5909^2 + 24542^2 .

It is not a de Polignac number, because 637226045 - 2² = 637226041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 637225996 and 637226014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (637226041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15716 + ... + 39005.

It is an arithmetic number, because the mean of its divisors is an integer number (50973543).

Almost surely, 2^637226045 is an apocalyptic number.

It is an amenable number.

637226045 is a deficient number, since it is larger than the sum of its proper divisors (178350643).

637226045 is a wasteful number, since it uses less digits than its factorization.

637226045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54880.

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 637226045 is about 25243.3366455388. The cubic root of 637226045 is about 860.5270093237.

The spelling of 637226045 in words is "six hundred thirty-seven million, two hundred twenty-six thousand, forty-five".