242539869477 has 4 divisors (see below), whose sum is σ = 323386492640. Its totient is φ = 161693246316.

The previous prime is 242539869457. The next prime is 242539869487. The reversal of 242539869477 is 774968935242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 242539869477 - 2³⁰ = 241466127653 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 (242539869457) 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, 40423311577 + ... + 40423311582.

It is an arithmetic number, because the mean of its divisors is an integer number (80846623160).

Almost surely, 2^242539869477 is an apocalyptic number.

It is an amenable number.

242539869477 is a deficient number, since it is larger than the sum of its proper divisors (80846623163).

242539869477 is an equidigital number, since it uses as much as digits as its factorization.

242539869477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80846623162.

The product of its digits is 182891520, while the sum is 66.

The spelling of 242539869477 in words is "two hundred forty-two billion, five hundred thirty-nine million, eight hundred sixty-nine thousand, four hundred seventy-seven".