5642423858772 has 120 divisors (see below), whose sum is σ = 15105017127816. Its totient is φ = 1835952797952.

The previous prime is 5642423858749. The next prime is 5642423858777. The reversal of 5642423858772 is 2778583242465.

It is a happy number.

5642423858772 is a `hidden beast` number, since 5 + 6 + 4 + 2 + 42 + 3 + 8 + 587 + 7 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1742099052996 + 3900324805776 = 1319886^2 + 1974924^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5642423858777) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2548918 + ... + 4216850.

Almost surely, 2^{5642423858772} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5642423858772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7552508563908).

5642423858772 is an abundant number, since it is smaller than the sum of its proper divisors (9462593269044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5642423858772 is a wasteful number, since it uses less digits than its factorization.

5642423858772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668199 (or 1668188 counting only the distinct ones).

The product of its digits is 180633600, while the sum is 63.

The spelling of 5642423858772 in words is "five trillion, six hundred forty-two billion, four hundred twenty-three million, eight hundred fifty-eight thousand, seven hundred seventy-two".