638580752351 has 8 divisors (see below), whose sum is σ = 666394408800. Its totient is φ = 610771202272.

The previous prime is 638580752323. The next prime is 638580752401. The reversal of 638580752351 is 153257085836.

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

It is not a de Polignac number, because 638580752351 - 2¹⁴ = 638580735967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 638580752293 and 638580752302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638580752651) 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, 706676 + ... + 1332873.

It is an arithmetic number, because the mean of its divisors is an integer number (83299301100).

Almost surely, 2^638580752351 is an apocalyptic number.

638580752351 is a deficient number, since it is larger than the sum of its proper divisors (27813656449).

638580752351 is a wasteful number, since it uses less digits than its factorization.

638580752351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053185.

The product of its (nonzero) digits is 6048000, while the sum is 53.

It can be divided in two parts, 638580 and 752351, that added together give a palindrome (1390931).

The spelling of 638580752351 in words is "six hundred thirty-eight billion, five hundred eighty million, seven hundred fifty-two thousand, three hundred fifty-one".