1642638063 has 32 divisors (see below), whose sum is σ = 2493856512. Its totient is φ = 952889600.

The previous prime is 1642638059. The next prime is 1642638077. The reversal of 1642638063 is 3608362461.

It is a cyclic number.

It is not a de Polignac number, because 1642638063 - 2² = 1642638059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642638563) 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, 60256 + ... + 83162.

It is an arithmetic number, because the mean of its divisors is an integer number (77933016).

Almost surely, 2^1642638063 is an apocalyptic number.

1642638063 is a deficient number, since it is larger than the sum of its proper divisors (851218449).

1642638063 is a wasteful number, since it uses less digits than its factorization.

1642638063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23015.

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 1642638063 is about 40529.4715361550. The cubic root of 1642638063 is about 1179.9056859887.

The spelling of 1642638063 in words is "one billion, six hundred forty-two million, six hundred thirty-eight thousand, sixty-three".