42542365477 has 2 divisors, whose sum is σ = 42542365478. Its totient is φ = 42542365476.

The previous prime is 42542365423. The next prime is 42542365499. The reversal of 42542365477 is 77456324524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41252047236 + 1290318241 = 203106^2 + 35921^2 .

It is a cyclic number.

It is not a de Polignac number, because 42542365477 - 2³⁵ = 8182627109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42542365477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42542360477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21271182738 + 21271182739.

It is an arithmetic number, because the mean of its divisors is an integer number (21271182739).

Almost surely, 2^42542365477 is an apocalyptic number.

It is an amenable number.

42542365477 is a deficient number, since it is larger than the sum of its proper divisors (1).

42542365477 is an equidigital number, since it uses as much as digits as its factorization.

42542365477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5644800, while the sum is 49.

The spelling of 42542365477 in words is "forty-two billion, five hundred forty-two million, three hundred sixty-five thousand, four hundred seventy-seven".