42156240540 has 96 divisors (see below), whose sum is σ = 119926410240. Its totient is φ = 11062123776.

The previous prime is 42156240527. The next prime is 42156240547. The reversal of 42156240540 is 4504265124.

42156240540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42156240547) 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, 4171734 + ... + 4181826.

It is an arithmetic number, because the mean of its divisors is an integer number (1249233440).

Almost surely, 2^42156240540 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 42156240540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59963205120).

42156240540 is an abundant number, since it is smaller than the sum of its proper divisors (77770169700).

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

42156240540 is a wasteful number, since it uses less digits than its factorization.

42156240540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11211 (or 11209 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

The spelling of 42156240540 in words is "forty-two billion, one hundred fifty-six million, two hundred forty thousand, five hundred forty".