638280852629 has 32 divisors (see below), whose sum is σ = 736110492672. Its totient is φ = 542142720000.

The previous prime is 638280852589. The next prime is 638280852641. The reversal of 638280852629 is 926258082836.

It is a happy number.

It is not a de Polignac number, because 638280852629 - 2³⁶ = 569561375893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638280852659) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 531457229 + ... + 531458429.

It is an arithmetic number, because the mean of its divisors is an integer number (23003452896).

Almost surely, 2^638280852629 is an apocalyptic number.

It is an amenable number.

638280852629 is a deficient number, since it is larger than the sum of its proper divisors (97829640043).

638280852629 is a wasteful number, since it uses less digits than its factorization.

638280852629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2757.

The product of its (nonzero) digits is 19906560, while the sum is 59.

The spelling of 638280852629 in words is "six hundred thirty-eight billion, two hundred eighty million, eight hundred fifty-two thousand, six hundred twenty-nine".