42506621660 has 48 divisors (see below), whose sum is σ = 90415332000. Its totient is φ = 16784734464.

The previous prime is 42506621561. The next prime is 42506621683. The reversal of 42506621660 is 6612660524.

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, 441986 + ... + 529494.

It is an arithmetic number, because the mean of its divisors is an integer number (1883652750).

Almost surely, 2^42506621660 is an apocalyptic number.

It is an amenable number.

42506621660 is an abundant number, since it is smaller than the sum of its proper divisors (47908710340).

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

42506621660 is a wasteful number, since it uses less digits than its factorization.

42506621660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87830 (or 87828 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 42506621660 in words is "forty-two billion, five hundred six million, six hundred twenty-one thousand, six hundred sixty".