45494021638 has 16 divisors (see below), whose sum is σ = 73649088576. Its totient is φ = 20951884800.

The previous prime is 45494021627. The next prime is 45494021653. The reversal of 45494021638 is 83612049454.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1877563 + ... + 1901638.

It is an arithmetic number, because the mean of its divisors is an integer number (4603068036).

Almost surely, 2^45494021638 is an apocalyptic number.

45494021638 is a deficient number, since it is larger than the sum of its proper divisors (28155066938).

45494021638 is a wasteful number, since it uses less digits than its factorization.

45494021638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3779679.

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 45494021638 in words is "forty-five billion, four hundred ninety-four million, twenty-one thousand, six hundred thirty-eight".