16126561506 has 32 divisors (see below), whose sum is σ = 35226404928. Its totient is φ = 4881117440.

The previous prime is 16126561501. The next prime is 16126561511. The reversal of 16126561506 is 60516562161.

It is an interprime number because it is at equal distance from previous prime (16126561501) and next prime (16126561511).

It is not an unprimeable number, because it can be changed into a prime (16126561501) 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, 85995 + ... + 199118.

It is an arithmetic number, because the mean of its divisors is an integer number (1100825154).

Almost surely, 2^16126561506 is an apocalyptic number.

16126561506 is an abundant number, since it is smaller than the sum of its proper divisors (19099843422).

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

16126561506 is a wasteful number, since it uses less digits than its factorization.

16126561506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285986.

The product of its (nonzero) digits is 64800, while the sum is 39.

The spelling of 16126561506 in words is "sixteen billion, one hundred twenty-six million, five hundred sixty-one thousand, five hundred six".