42672578644 has 12 divisors (see below), whose sum is σ = 74769326100. Its totient is φ = 21309914048.

The previous prime is 42672578633. The next prime is 42672578647. The reversal of 42672578644 is 44687527624.

It can be written as a sum of positive squares in 2 ways, for example, as 25185690000 + 17486888644 = 158700^2 + 132238^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42672578647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6590179 + ... + 6596650.

It is an arithmetic number, because the mean of its divisors is an integer number (6230777175).

Almost surely, 2^42672578644 is an apocalyptic number.

It is an amenable number.

42672578644 is a deficient number, since it is larger than the sum of its proper divisors (32096747456).

42672578644 is a wasteful number, since it uses less digits than its factorization.

42672578644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13187642 (or 13187640 counting only the distinct ones).

The product of its digits is 18063360, while the sum is 55.

The spelling of 42672578644 in words is "forty-two billion, six hundred seventy-two million, five hundred seventy-eight thousand, six hundred forty-four".