42621863544 has 432 divisors, whose sum is σ = 136612457280. Its totient is φ = 11984993280.

The previous prime is 42621863533. The next prime is 42621863561. The reversal of 42621863544 is 44536812624.

42621863544 is a `hidden beast` number, since 4 + 2 + 6 + 2 + 1 + 8 + 635 + 4 + 4 = 666.

42621863544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 42621863544.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 136171932 + ... + 136172244.

It is an arithmetic number, because the mean of its divisors is an integer number (316232540).

Almost surely, 2^42621863544 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 42621863544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68306228640).

42621863544 is an abundant number, since it is smaller than the sum of its proper divisors (93990593736).

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

42621863544 is a wasteful number, since it uses less digits than its factorization.

42621863544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420 (or 381 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 45.

The spelling of 42621863544 in words is "forty-two billion, six hundred twenty-one million, eight hundred sixty-three thousand, five hundred forty-four".