42156655242 has 64 divisors (see below), whose sum is σ = 94797077760. Its totient is φ = 12400717824.

The previous prime is 42156655241. The next prime is 42156655253. The reversal of 42156655242 is 24255665124.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 42156655194 and 42156655203.

It is not an unprimeable number, because it can be changed into a prime (42156655241) 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, 4137258 + ... + 4147434.

It is an arithmetic number, because the mean of its divisors is an integer number (1481204340).

Almost surely, 2^42156655242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42156655242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47398538880).

42156655242 is an abundant number, since it is smaller than the sum of its proper divisors (52640422518).

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

42156655242 is a wasteful number, since it uses less digits than its factorization.

42156655242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12527.

The product of its digits is 576000, while the sum is 42.

The spelling of 42156655242 in words is "forty-two billion, one hundred fifty-six million, six hundred fifty-five thousand, two hundred forty-two".