16121440340 has 96 divisors (see below), whose sum is σ = 38265696000. Its totient is φ = 5668669440.

The previous prime is 16121440333. The next prime is 16121440399. The reversal of 16121440340 is 4304412161.

It is a happy 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, 441086 + ... + 476234.

It is an arithmetic number, because the mean of its divisors is an integer number (398601000).

Almost surely, 2^16121440340 is an apocalyptic number.

16121440340 is a gapful number since it is divisible by the number (10) 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 16121440340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19132848000).

16121440340 is an abundant number, since it is smaller than the sum of its proper divisors (22144255660).

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

16121440340 is a wasteful number, since it uses less digits than its factorization.

16121440340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35265 (or 35263 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The spelling of 16121440340 in words is "sixteen billion, one hundred twenty-one million, four hundred forty thousand, three hundred forty".