15720845138375 has 32 divisors (see below), whose sum is σ = 22371687426816. Its totient is φ = 10926343027200.

The previous prime is 15720845138353. The next prime is 15720845138387. The reversal of 15720845138375 is 57383154802751.

It is not a de Polignac number, because 15720845138375 - 2⁶ = 15720845138311 is a prime.

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, 284512559 + ... + 284567808.

It is an arithmetic number, because the mean of its divisors is an integer number (699115232088).

Almost surely, 2^{15720845138375} is an apocalyptic number.

15720845138375 is a deficient number, since it is larger than the sum of its proper divisors (6650842288441).

15720845138375 is a wasteful number, since it uses less digits than its factorization.

15720845138375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569080412 (or 569080402 counting only the distinct ones).

The product of its (nonzero) digits is 28224000, while the sum is 59.

The spelling of 15720845138375 in words is "fifteen trillion, seven hundred twenty billion, eight hundred forty-five million, one hundred thirty-eight thousand, three hundred seventy-five".