638005000969 has 4 divisors (see below), whose sum is σ = 729148572544. Its totient is φ = 546861429396.

The previous prime is 638005000957. The next prime is 638005000991. The reversal of 638005000969 is 969000500836.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 638005000969 - 2¹³ = 638004992777 is a prime.

It is a super-2 number, since 2×638005000969² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (638005000939) 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, 45571785777 + ... + 45571785790.

It is an arithmetic number, because the mean of its divisors is an integer number (182287143136).

Almost surely, 2^638005000969 is an apocalyptic number.

It is an amenable number.

638005000969 is a deficient number, since it is larger than the sum of its proper divisors (91143571575).

638005000969 is an equidigital number, since it uses as much as digits as its factorization.

638005000969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91143571574.

The product of its (nonzero) digits is 349920, while the sum is 46.

The spelling of 638005000969 in words is "six hundred thirty-eight billion, five million, nine hundred sixty-nine", and thus it is an aban number.