126016565990 has 64 divisors (see below), whose sum is σ = 270615223296. Its totient is φ = 41310352512.

The previous prime is 126016565971. The next prime is 126016566001. The reversal of 126016565990 is 99565610621.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4305044 + ... + 4334216.

It is an arithmetic number, because the mean of its divisors is an integer number (4228362864).

Almost surely, 2^126016565990 is an apocalyptic number.

126016565990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

126016565990 is an abundant number, since it is smaller than the sum of its proper divisors (144598657306).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126016565990 is a wasteful number, since it uses less digits than its factorization.

126016565990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31893.

The product of its (nonzero) digits is 874800, while the sum is 50.

The spelling of 126016565990 in words is "one hundred twenty-six billion, sixteen million, five hundred sixty-five thousand, nine hundred ninety".