638237373355 has 8 divisors (see below), whose sum is σ = 773042650992. Its totient is φ = 505818030048.

The previous prime is 638237373353. The next prime is 638237373373. The reversal of 638237373355 is 553373732836.

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 638237373355 - 2¹ = 638237373353 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 638237373296 and 638237373305.

It is not an unprimeable number, because it can be changed into a prime (638237373353) 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, 596482992 + ... + 596484061.

It is an arithmetic number, because the mean of its divisors is an integer number (96630331374).

Almost surely, 2^638237373355 is an apocalyptic number.

638237373355 is a deficient number, since it is larger than the sum of its proper divisors (134805277637).

638237373355 is a wasteful number, since it uses less digits than its factorization.

638237373355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192967165.

The product of its digits is 28576800, while the sum is 55.

The spelling of 638237373355 in words is "six hundred thirty-eight billion, two hundred thirty-seven million, three hundred seventy-three thousand, three hundred fifty-five".