42256415620 has 96 divisors (see below), whose sum is σ = 94079905920. Its totient is φ = 15915325440.

The previous prime is 42256415447. The next prime is 42256415627. The reversal of 42256415620 is 2651465224.

It is a happy number.

It is a super-2 number, since 2×42256415620² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42256415620.

It is not an unprimeable number, because it can be changed into a prime (42256415627) 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, 27208764 + ... + 27210316.

It is an arithmetic number, because the mean of its divisors is an integer number (979999020).

Almost surely, 2^42256415620 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 42256415620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47039952960).

42256415620 is an abundant number, since it is smaller than the sum of its proper divisors (51823490300).

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

42256415620 is a wasteful number, since it uses less digits than its factorization.

42256415620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2725 (or 2723 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 42256415620 in words is "forty-two billion, two hundred fifty-six million, four hundred fifteen thousand, six hundred twenty".