15720106510057 has 4 divisors (see below), whose sum is σ = 15720123375360. Its totient is φ = 15720089644756.

The previous prime is 15720106510049. The next prime is 15720106510081. The reversal of 15720106510057 is 75001560102751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15720106510057 - 2³ = 15720106510049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15720106310057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6947293 + ... + 8927770.

It is an arithmetic number, because the mean of its divisors is an integer number (3930030843840).

Almost surely, 2^{15720106510057} is an apocalyptic number.

It is an amenable number.

15720106510057 is a deficient number, since it is larger than the sum of its proper divisors (16865303).

15720106510057 is an equidigital number, since it uses as much as digits as its factorization.

15720106510057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16865302.

The product of its (nonzero) digits is 73500, while the sum is 40.

The spelling of 15720106510057 in words is "fifteen trillion, seven hundred twenty billion, one hundred six million, five hundred ten thousand, fifty-seven".