639054553 has 8 divisors (see below), whose sum is σ = 660670976. Its totient is φ = 617500800.

The previous prime is 639054511. The next prime is 639054557. The reversal of 639054553 is 355450936.

It is a happy number.

639054553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 639054553 - 2²⁵ = 605500121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (639054557) 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, 5548 + ... + 36178.

It is an arithmetic number, because the mean of its divisors is an integer number (82583872).

Almost surely, 2^639054553 is an apocalyptic number.

It is an amenable number.

639054553 is a deficient number, since it is larger than the sum of its proper divisors (21616423).

639054553 is a wasteful number, since it uses less digits than its factorization.

639054553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31335.

The product of its (nonzero) digits is 243000, while the sum is 40.

The square root of 639054553 is about 25279.5283381633. The cubic root of 639054553 is about 861.3493119188.

The spelling of 639054553 in words is "six hundred thirty-nine million, fifty-four thousand, five hundred fifty-three".