2057865642 has 96 divisors (see below), whose sum is σ = 5599771200. Its totient is φ = 557002656.

The previous prime is 2057865617. The next prime is 2057865647. The reversal of 2057865642 is 2465687502.

2057865642 is a `hidden beast` number, since 2 + 0 + 5 + 7 + 86 + 564 + 2 = 666.

It is a super-2 number, since 2×2057865642² = 8469622001048144328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2057865647) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29808 + ... + 70740.

It is an arithmetic number, because the mean of its divisors is an integer number (58330950).

Almost surely, 2^2057865642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2057865642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2799885600).

2057865642 is an abundant number, since it is smaller than the sum of its proper divisors (3541905558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2057865642 is a wasteful number, since it uses less digits than its factorization.

2057865642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40977 (or 40964 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The square root of 2057865642 is about 45363.7040154351. The cubic root of 2057865642 is about 1271.9567335764.

The spelling of 2057865642 in words is "two billion, fifty-seven million, eight hundred sixty-five thousand, six hundred forty-two".