42539749313 has 4 divisors (see below), whose sum is σ = 42541570260. Its totient is φ = 42537928368.

The previous prime is 42539749237. The next prime is 42539749319. The reversal of 42539749313 is 31394793524.

42539749313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31977665329 + 10562083984 = 178823^2 + 102772^2 .

It is a cyclic number.

It is not a de Polignac number, because 42539749313 - 2³⁰ = 41466007489 is a prime.

It is a super-2 number, since 2×42539749313² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42539749319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 874970 + ... + 922307.

It is an arithmetic number, because the mean of its divisors is an integer number (10635392565).

Almost surely, 2^42539749313 is an apocalyptic number.

It is an amenable number.

42539749313 is a deficient number, since it is larger than the sum of its proper divisors (1820947).

42539749313 is a wasteful number, since it uses less digits than its factorization.

42539749313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1820946.

The product of its digits is 2449440, while the sum is 50.

The spelling of 42539749313 in words is "forty-two billion, five hundred thirty-nine million, seven hundred forty-nine thousand, three hundred thirteen".