42534738977 has 2 divisors, whose sum is σ = 42534738978. Its totient is φ = 42534738976.

The previous prime is 42534738959. The next prime is 42534738979. The reversal of 42534738977 is 77983743524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35022876736 + 7511862241 = 187144^2 + 86671^2 .

It is a cyclic number.

It is not a de Polignac number, because 42534738977 - 2⁶ = 42534738913 is a prime.

Together with 42534738979, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42534738979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21267369488 + 21267369489.

It is an arithmetic number, because the mean of its divisors is an integer number (21267369489).

Almost surely, 2^42534738977 is an apocalyptic number.

It is an amenable number.

42534738977 is a deficient number, since it is larger than the sum of its proper divisors (1).

42534738977 is an equidigital number, since it uses as much as digits as its factorization.

42534738977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35562240, while the sum is 59.

The spelling of 42534738977 in words is "forty-two billion, five hundred thirty-four million, seven hundred thirty-eight thousand, nine hundred seventy-seven".