16121014452 has 72 divisors (see below), whose sum is σ = 42139240416. Its totient is φ = 5193549504.

The previous prime is 16121014451. The next prime is 16121014453. The reversal of 16121014452 is 25441012161.

16121014452 is a `hidden beast` number, since 1 + 6 + 1 + 210 + 1 + 445 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (16121014451) and next prime (16121014453).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16121014451) 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, 64783 + ... + 190889.

It is an arithmetic number, because the mean of its divisors is an integer number (585267228).

Almost surely, 2^16121014452 is an apocalyptic number.

16121014452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16121014452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21069620208).

16121014452 is an abundant number, since it is smaller than the sum of its proper divisors (26018225964).

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

16121014452 is a wasteful number, since it uses less digits than its factorization.

16121014452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126237 (or 126232 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

It can be divided in two parts, 1612 and 1014452, that added together give a square (1016064 = 1008²).

The spelling of 16121014452 in words is "sixteen billion, one hundred twenty-one million, fourteen thousand, four hundred fifty-two".