1638764002623 has 32 divisors (see below), whose sum is σ = 2386203528960. Its totient is φ = 992129783040.

The previous prime is 1638764002597. The next prime is 1638764002649. The reversal of 1638764002623 is 3262004678361.

It is an interprime number because it is at equal distance from previous prime (1638764002597) and next prime (1638764002649).

It is not a de Polignac number, because 1638764002623 - 2⁶ = 1638764002559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1638764000623) 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, 136070040 + ... + 136082082.

It is an arithmetic number, because the mean of its divisors is an integer number (74568860280).

Almost surely, 2^{1638764002623} is an apocalyptic number.

1638764002623 is a deficient number, since it is larger than the sum of its proper divisors (747439526337).

1638764002623 is a wasteful number, since it uses less digits than its factorization.

1638764002623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16119.

The product of its (nonzero) digits is 1741824, while the sum is 48.

The spelling of 1638764002623 in words is "one trillion, six hundred thirty-eight billion, seven hundred sixty-four million, two thousand, six hundred twenty-three".