42958209577 has 4 divisors (see below), whose sum is σ = 42961754196. Its totient is φ = 42954664960.

The previous prime is 42958209563. The next prime is 42958209601. The reversal of 42958209577 is 77590285924.

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 7419927321 + 35538282256 = 86139^2 + 188516^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42958209577 is a prime.

It is a super-2 number, since 2×42958209577² (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 (42958209557) 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, 1754068 + ... + 1778389.

It is an arithmetic number, because the mean of its divisors is an integer number (10740438549).

Almost surely, 2^42958209577 is an apocalyptic number.

It is an amenable number.

42958209577 is a deficient number, since it is larger than the sum of its proper divisors (3544619).

42958209577 is a wasteful number, since it uses less digits than its factorization.

42958209577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3544618.

The product of its (nonzero) digits is 12700800, while the sum is 58.

The spelling of 42958209577 in words is "forty-two billion, nine hundred fifty-eight million, two hundred nine thousand, five hundred seventy-seven".