15720746023720 has 16 divisors (see below), whose sum is σ = 35371678553460. Its totient is φ = 6288298409472.

The previous prime is 15720746023657. The next prime is 15720746023729. The reversal of 15720746023720 is 2732064702751.

It can be written as a sum of positive squares in 2 ways, for example, as 15390509609476 + 330236414244 = 3923074^2 + 574662^2 .

It is not an unprimeable number, because it can be changed into a prime (15720746023729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196509325257 + ... + 196509325336.

Almost surely, 2^{15720746023720} is an apocalyptic number.

15720746023720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15720746023720 is an abundant number, since it is smaller than the sum of its proper divisors (19650932529740).

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

15720746023720 is a wasteful number, since it uses less digits than its factorization.

15720746023720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393018650604 (or 393018650600 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 46.

The spelling of 15720746023720 in words is "fifteen trillion, seven hundred twenty billion, seven hundred forty-six million, twenty-three thousand, seven hundred twenty".