42078480521 has 32 divisors (see below), whose sum is σ = 52781414400. Its totient is φ = 32589002880.

The previous prime is 42078480517. The next prime is 42078480557. The reversal of 42078480521 is 12508487024.

It is not a de Polignac number, because 42078480521 - 2² = 42078480517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42078450521) 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, 11821340 + ... + 11824898.

It is an arithmetic number, because the mean of its divisors is an integer number (1649419200).

Almost surely, 2^42078480521 is an apocalyptic number.

It is an amenable number.

42078480521 is a deficient number, since it is larger than the sum of its proper divisors (10702933879).

42078480521 is a wasteful number, since it uses less digits than its factorization.

42078480521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4469.

The product of its (nonzero) digits is 143360, while the sum is 41.

The spelling of 42078480521 in words is "forty-two billion, seventy-eight million, four hundred eighty thousand, five hundred twenty-one".