57015720109 has 4 divisors (see below), whose sum is σ = 57538800220. Its totient is φ = 56492640000.

The previous prime is 57015720001. The next prime is 57015720131. The reversal of 57015720109 is 90102751075.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16846742025 + 40168978084 = 129795^2 + 200422^2 .

It is a cyclic number.

It is not a de Polignac number, because 57015720109 - 2¹⁹ = 57015195821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57015720709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261539892 + ... + 261540109.

It is an arithmetic number, because the mean of its divisors is an integer number (14384700055).

Almost surely, 2^57015720109 is an apocalyptic number.

It is an amenable number.

57015720109 is a deficient number, since it is larger than the sum of its proper divisors (523080111).

57015720109 is a wasteful number, since it uses less digits than its factorization.

57015720109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523080110.

The product of its (nonzero) digits is 22050, while the sum is 37.

The spelling of 57015720109 in words is "fifty-seven billion, fifteen million, seven hundred twenty thousand, one hundred nine".