1995160257 has 12 divisors (see below), whose sum is σ = 2882380644. Its totient is φ = 1329884160.

The previous prime is 1995160253. The next prime is 1995160283. The reversal of 1995160257 is 7520615991.

It can be written as a sum of positive squares in 2 ways, for example, as 1894338576 + 100821681 = 43524^2 + 10041^2 .

It is not a de Polignac number, because 1995160257 - 2² = 1995160253 is a prime.

It is a super-2 number, since 2×1995160257² = 7961328902224612098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1995160253) 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 11 ways as a sum of consecutive naturals, for example, 52513 + ... + 82145.

It is an arithmetic number, because the mean of its divisors is an integer number (240198387).

Almost surely, 2^1995160257 is an apocalyptic number.

It is an amenable number.

1995160257 is a deficient number, since it is larger than the sum of its proper divisors (887220387).

1995160257 is a wasteful number, since it uses less digits than its factorization.

1995160257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37120 (or 37117 counting only the distinct ones).

The product of its (nonzero) digits is 170100, while the sum is 45.

The square root of 1995160257 is about 44667.2168038260. The cubic root of 1995160257 is about 1258.9039466865.

It can be divided in two parts, 19951 and 60257, that added together give a palindrome (80208).

The spelling of 1995160257 in words is "one billion, nine hundred ninety-five million, one hundred sixty thousand, two hundred fifty-seven".