42943698721 has 24 divisors (see below), whose sum is σ = 54830226752. Its totient is φ = 32914015200.

The previous prime is 42943698703. The next prime is 42943698727. The reversal of 42943698721 is 12789634924.

It is not a de Polignac number, because 42943698721 - 2¹³ = 42943690529 is a prime.

It is a super-2 number, since 2×42943698721² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42943698727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 363915 + ... + 467248.

Almost surely, 2^42943698721 is an apocalyptic number.

It is an amenable number.

42943698721 is a deficient number, since it is larger than the sum of its proper divisors (11886528031).

42943698721 is a wasteful number, since it uses less digits than its factorization.

42943698721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831253 (or 831242 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 55.

The spelling of 42943698721 in words is "forty-two billion, nine hundred forty-three million, six hundred ninety-eight thousand, seven hundred twenty-one".