2057348781 has 32 divisors (see below), whose sum is σ = 3184254720. Its totient is φ = 1310360832.

The previous prime is 2057348779. The next prime is 2057348801. The reversal of 2057348781 is 1878437502.

2057348781 is a `hidden beast` number, since 2 + 0 + 573 + 4 + 8 + 78 + 1 = 666.

It is not a de Polignac number, because 2057348781 - 2¹ = 2057348779 is a prime.

It is a super-2 number, since 2×2057348781² = 8465368013364371922, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2057348771) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 739465 + ... + 742241.

It is an arithmetic number, because the mean of its divisors is an integer number (99507960).

Almost surely, 2^2057348781 is an apocalyptic number.

It is an amenable number.

2057348781 is a deficient number, since it is larger than the sum of its proper divisors (1126905939).

2057348781 is a wasteful number, since it uses less digits than its factorization.

2057348781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4002 (or 3996 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 2057348781 is about 45358.0068014458. The cubic root of 2057348781 is about 1271.8502349039.

The spelling of 2057348781 in words is "two billion, fifty-seven million, three hundred forty-eight thousand, seven hundred eighty-one".