42506983957 has 4 divisors (see below), whose sum is σ = 45007394796. Its totient is φ = 40006573120.

The previous prime is 42506983891. The next prime is 42506983963. The reversal of 42506983957 is 75938960524.

42506983957 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 25052874961 + 17454108996 = 158281^2 + 132114^2 .

It is a cyclic number.

It is not a de Polignac number, because 42506983957 - 2⁷ = 42506983829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42506923957) 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, 1250205394 + ... + 1250205427.

It is an arithmetic number, because the mean of its divisors is an integer number (11251848699).

Almost surely, 2^42506983957 is an apocalyptic number.

It is an amenable number.

42506983957 is a deficient number, since it is larger than the sum of its proper divisors (2500410839).

42506983957 is a wasteful number, since it uses less digits than its factorization.

42506983957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2500410838.

The product of its (nonzero) digits is 16329600, while the sum is 58.

The spelling of 42506983957 in words is "forty-two billion, five hundred six million, nine hundred eighty-three thousand, nine hundred fifty-seven".