16015172420 has 24 divisors (see below), whose sum is σ = 36218928984. Its totient is φ = 5913294336.

The previous prime is 16015172413. The next prime is 16015172429. The reversal of 16015172420 is 2427151061.

It can be written as a sum of positive squares in 4 ways, for example, as 545783044 + 15469389376 = 23362^2 + 124376^2 .

It is not an unprimeable number, because it can be changed into a prime (16015172429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30798149 + ... + 30798668.

It is an arithmetic number, because the mean of its divisors is an integer number (1509122041).

Almost surely, 2^16015172420 is an apocalyptic number.

16015172420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16015172420 is an abundant number, since it is smaller than the sum of its proper divisors (20203756564).

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

16015172420 is a wasteful number, since it uses less digits than its factorization.

16015172420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61596839 (or 61596837 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The spelling of 16015172420 in words is "sixteen billion, fifteen million, one hundred seventy-two thousand, four hundred twenty".