1638970023807 has 24 divisors (see below), whose sum is σ = 2422533155328. Its totient is φ = 1067202738000.

The previous prime is 1638970023791. The next prime is 1638970023809. The reversal of 1638970023807 is 7083200798361.

It is not a de Polignac number, because 1638970023807 - 2⁴ = 1638970023791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1638970023809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20281432 + ... + 20362082.

It is an arithmetic number, because the mean of its divisors is an integer number (100938881472).

Almost surely, 2^{1638970023807} is an apocalyptic number.

1638970023807 is a deficient number, since it is larger than the sum of its proper divisors (783563131521).

1638970023807 is a wasteful number, since it uses less digits than its factorization.

1638970023807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133211 (or 133208 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 1638970023807 in words is "one trillion, six hundred thirty-eight billion, nine hundred seventy million, twenty-three thousand, eight hundred seven".