638005000955 has 8 divisors (see below), whose sum is σ = 874978287072. Its totient is φ = 437489143488.

The previous prime is 638005000949. The next prime is 638005000957. The reversal of 638005000955 is 559000500836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 638005000955 - 2⁴ = 638005000939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (638005000957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9114357122 + ... + 9114357191.

It is an arithmetic number, because the mean of its divisors is an integer number (109372285884).

Almost surely, 2^638005000955 is an apocalyptic number.

638005000955 is a deficient number, since it is larger than the sum of its proper divisors (236973286117).

638005000955 is a wasteful number, since it uses less digits than its factorization.

638005000955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18228714325.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 638005000955 in words is "six hundred thirty-eight billion, five million, nine hundred fifty-five", and thus it is an aban number.