42166451522 has 32 divisors (see below), whose sum is σ = 68707623600. Its totient is φ = 19292785920.

The previous prime is 42166451507. The next prime is 42166451527. The reversal of 42166451522 is 22515466124.

It can be written as a sum of positive squares in 8 ways, for example, as 15089419921 + 27077031601 = 122839^2 + 164551^2 .

It is a super-2 number, since 2×42166451522² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42166451527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1556372 + ... + 1583232.

Almost surely, 2^42166451522 is an apocalyptic number.

42166451522 is a deficient number, since it is larger than the sum of its proper divisors (26541172078).

42166451522 is a wasteful number, since it uses less digits than its factorization.

42166451522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27398.

The product of its digits is 115200, while the sum is 38.

The spelling of 42166451522 in words is "forty-two billion, one hundred sixty-six million, four hundred fifty-one thousand, five hundred twenty-two".