42638233487 has 2 divisors, whose sum is σ = 42638233488. Its totient is φ = 42638233486.

The previous prime is 42638233481. The next prime is 42638233499. The reversal of 42638233487 is 78433283624.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42638233487 - 2⁶ = 42638233423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42638233481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21319116743 + 21319116744.

It is an arithmetic number, because the mean of its divisors is an integer number (21319116744).

Almost surely, 2^42638233487 is an apocalyptic number.

42638233487 is a deficient number, since it is larger than the sum of its proper divisors (1).

42638233487 is an equidigital number, since it uses as much as digits as its factorization.

42638233487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4644864, while the sum is 50.

The spelling of 42638233487 in words is "forty-two billion, six hundred thirty-eight million, two hundred thirty-three thousand, four hundred eighty-seven".