1638501034245 has 32 divisors (see below), whose sum is σ = 2683917236352. Its totient is φ = 853115784192.

The previous prime is 1638501034229. The next prime is 1638501034249. The reversal of 1638501034245 is 5424301058361.

It is not a de Polignac number, because 1638501034245 - 2⁴ = 1638501034229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1638501034197 and 1638501034206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1638501034249) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 648177 + ... + 1922793.

It is an arithmetic number, because the mean of its divisors is an integer number (83872413636).

Almost surely, 2^{1638501034245} is an apocalyptic number.

1638501034245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1638501034245 is a deficient number, since it is larger than the sum of its proper divisors (1045416202107).

1638501034245 is a wasteful number, since it uses less digits than its factorization.

1638501034245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276661.

The product of its (nonzero) digits is 345600, while the sum is 42.

The spelling of 1638501034245 in words is "one trillion, six hundred thirty-eight billion, five hundred one million, thirty-four thousand, two hundred forty-five".