42454551522391 has 2 divisors, whose sum is σ = 42454551522392. Its totient is φ = 42454551522390.

The previous prime is 42454551522379. The next prime is 42454551522421. The reversal of 42454551522391 is 19322515545424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42454551522391 - 2¹⁷ = 42454551391319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42454551522311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21227275761195 + 21227275761196.

It is an arithmetic number, because the mean of its divisors is an integer number (21227275761196).

Almost surely, 2^{42454551522391} is an apocalyptic number.

42454551522391 is a deficient number, since it is larger than the sum of its proper divisors (1).

42454551522391 is an equidigital number, since it uses as much as digits as its factorization.

42454551522391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640000, while the sum is 52.

The spelling of 42454551522391 in words is "forty-two trillion, four hundred fifty-four billion, five hundred fifty-one million, five hundred twenty-two thousand, three hundred ninety-one".