2071817657 has 24 divisors (see below), whose sum is σ = 2614248000. Its totient is φ = 1627377696.

The previous prime is 2071817653. The next prime is 2071817723. The reversal of 2071817657 is 7567181702.

It is not a de Polignac number, because 2071817657 - 2² = 2071817653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2071817653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76844 + ... + 100242.

It is an arithmetic number, because the mean of its divisors is an integer number (108927000).

Almost surely, 2^2071817657 is an apocalyptic number.

It is an amenable number.

2071817657 is a deficient number, since it is larger than the sum of its proper divisors (542430343).

2071817657 is a wasteful number, since it uses less digits than its factorization.

2071817657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23565 (or 23558 counting only the distinct ones).

The product of its (nonzero) digits is 164640, while the sum is 44.

The square root of 2071817657 is about 45517.2237400305. The cubic root of 2071817657 is about 1274.8248190947.

The spelling of 2071817657 in words is "two billion, seventy-one million, eight hundred seventeen thousand, six hundred fifty-seven".