638104246401894 has 8 divisors (see below), whose sum is σ = 1276208492803800. Its totient is φ = 212701415467296.

The previous prime is 638104246401889. The next prime is 638104246401899. The reversal of 638104246401894 is 498104642401836.

It is an interprime number because it is at equal distance from previous prime (638104246401889) and next prime (638104246401899).

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

638104246401894 is an admirable number.

It is a super-2 number, since 2×638104246401894² (a number of 30 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638104246401899) 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, 53175353866819 + ... + 53175353866830.

It is an arithmetic number, because the mean of its divisors is an integer number (159526061600475).

Almost surely, 2^{638104246401894} is an apocalyptic number.

638104246401894 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

638104246401894 is a wasteful number, since it uses less digits than its factorization.

638104246401894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106350707733654.

The product of its (nonzero) digits is 31850496, while the sum is 60.

The spelling of 638104246401894 in words is "six hundred thirty-eight trillion, one hundred four billion, two hundred forty-six million, four hundred one thousand, eight hundred ninety-four".