42989660994 has 64 divisors (see below), whose sum is σ = 100733377536. Its totient is φ = 11974906944.

The previous prime is 42989660941. The next prime is 42989660999. The reversal of 42989660994 is 49906698924.

It is a happy number.

It is a super-2 number, since 2×42989660994² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42989660999) 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, 966124 + ... + 1009640.

It is an arithmetic number, because the mean of its divisors is an integer number (1573959024).

Almost surely, 2^42989660994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42989660994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50366688768).

42989660994 is an abundant number, since it is smaller than the sum of its proper divisors (57743716542).

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

42989660994 is a wasteful number, since it uses less digits than its factorization.

42989660994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44119.

The product of its (nonzero) digits is 60466176, while the sum is 66.

The spelling of 42989660994 in words is "forty-two billion, nine hundred eighty-nine million, six hundred sixty thousand, nine hundred ninety-four".