42549478752 has 96 divisors (see below), whose sum is σ = 122262981120. Its totient is φ = 12849681920.

The previous prime is 42549478739. The next prime is 42549478757. The reversal of 42549478752 is 25787494524.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 42549478692 and 42549478701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42549478757) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240649 + ... + 378167.

It is an arithmetic number, because the mean of its divisors is an integer number (1273572720).

Almost surely, 2^42549478752 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 42549478752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61131490560).

42549478752 is an abundant number, since it is smaller than the sum of its proper divisors (79713502368).

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

42549478752 is a wasteful number, since it uses less digits than its factorization.

42549478752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137836 (or 137828 counting only the distinct ones).

The product of its digits is 22579200, while the sum is 57.

The spelling of 42549478752 in words is "forty-two billion, five hundred forty-nine million, four hundred seventy-eight thousand, seven hundred fifty-two".