42166451523 has 16 divisors (see below), whose sum is σ = 65564940800. Its totient is φ = 24095114568.

The previous prime is 42166451507. The next prime is 42166451527. The reversal of 42166451523 is 32515466124.

42166451523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42166451523 - 2⁴ = 42166451507 is a prime.

It is a Duffinian number.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20488015 + ... + 20490072.

It is an arithmetic number, because the mean of its divisors is an integer number (4097808800).

Almost surely, 2^42166451523 is an apocalyptic number.

42166451523 is a deficient number, since it is larger than the sum of its proper divisors (23398489277).

42166451523 is an equidigital number, since it uses as much as digits as its factorization.

42166451523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40978111 (or 40978097 counting only the distinct ones).

The product of its digits is 172800, while the sum is 39.

The spelling of 42166451523 in words is "forty-two billion, one hundred sixty-six million, four hundred fifty-one thousand, five hundred twenty-three".