42166451527 has 2 divisors, whose sum is σ = 42166451528. Its totient is φ = 42166451526.

The previous prime is 42166451507. The next prime is 42166451557. The reversal of 42166451527 is 72515466124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42166451527 - 2¹⁵ = 42166418759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42166451507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21083225763 + 21083225764.

It is an arithmetic number, because the mean of its divisors is an integer number (21083225764).

Almost surely, 2^42166451527 is an apocalyptic number.

42166451527 is a deficient number, since it is larger than the sum of its proper divisors (1).

42166451527 is an equidigital number, since it uses as much as digits as its factorization.

42166451527 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 43.

The spelling of 42166451527 in words is "forty-two billion, one hundred sixty-six million, four hundred fifty-one thousand, five hundred twenty-seven".