427742517877 has 4 divisors (see below), whose sum is σ = 452903842476. Its totient is φ = 402581193280.

The previous prime is 427742517859. The next prime is 427742517883. The reversal of 427742517877 is 778715247724.

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 218716164241 + 209026353636 = 467671^2 + 457194^2 .

It is a cyclic number.

It is not a de Polignac number, because 427742517877 - 2⁷ = 427742517749 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 (427742517857) 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, 12580662274 + ... + 12580662307.

It is an arithmetic number, because the mean of its divisors is an integer number (113225960619).

Almost surely, 2^427742517877 is an apocalyptic number.

It is an amenable number.

427742517877 is a deficient number, since it is larger than the sum of its proper divisors (25161324599).

427742517877 is a wasteful number, since it uses less digits than its factorization.

427742517877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25161324598.

The product of its digits is 43025920, while the sum is 61.

The spelling of 427742517877 in words is "four hundred twenty-seven billion, seven hundred forty-two million, five hundred seventeen thousand, eight hundred seventy-seven".