2057115747 has 4 divisors (see below), whose sum is σ = 2742821000. Its totient is φ = 1371410496.

The previous prime is 2057115721. The next prime is 2057115761. The reversal of 2057115747 is 7475117502.

It is a happy number.

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

It is not a de Polignac number, because 2057115747 - 2⁸ = 2057115491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2057125747) 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, 342852622 + ... + 342852627.

It is an arithmetic number, because the mean of its divisors is an integer number (685705250).

Almost surely, 2^2057115747 is an apocalyptic number.

2057115747 is a deficient number, since it is larger than the sum of its proper divisors (685705253).

2057115747 is an equidigital number, since it uses as much as digits as its factorization.

2057115747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685705252.

The product of its (nonzero) digits is 68600, while the sum is 39.

The square root of 2057115747 is about 45355.4378988893. The cubic root of 2057115747 is about 1271.8022126561.

The spelling of 2057115747 in words is "two billion, fifty-seven million, one hundred fifteen thousand, seven hundred forty-seven".