42155434520 has 64 divisors (see below), whose sum is σ = 100282060800. Its totient is φ = 15904252800.

The previous prime is 42155434499. The next prime is 42155434579. The reversal of 42155434520 is 2543455124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50345 + ... + 294695.

It is an arithmetic number, because the mean of its divisors is an integer number (1566907200).

Almost surely, 2^42155434520 is an apocalyptic number.

42155434520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42155434520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50141030400).

42155434520 is an abundant number, since it is smaller than the sum of its proper divisors (58126626280).

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

42155434520 is a wasteful number, since it uses less digits than its factorization.

42155434520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244608 (or 244604 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 42155434520 its reverse (2543455124), we get a palindrome (44698889644).

The spelling of 42155434520 in words is "forty-two billion, one hundred fifty-five million, four hundred thirty-four thousand, five hundred twenty".