16126121050 has 48 divisors (see below), whose sum is σ = 32317853400. Its totient is φ = 5951312640.

The previous prime is 16126121041. The next prime is 16126121051. The reversal of 16126121050 is 5012162161.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 3958045569 + 12168075481 = 62913^2 + 110309^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (16126121051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1651984 + ... + 1661716.

Almost surely, 2^16126121050 is an apocalyptic number.

16126121050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16126121050 is an abundant number, since it is smaller than the sum of its proper divisors (16191732350).

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

16126121050 is a wasteful number, since it uses less digits than its factorization.

16126121050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12307 (or 12302 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The spelling of 16126121050 in words is "sixteen billion, one hundred twenty-six million, one hundred twenty-one thousand, fifty".