5681913457 has 4 divisors (see below), whose sum is σ = 6198451056. Its totient is φ = 5165375860.

The previous prime is 5681913443. The next prime is 5681913509. The reversal of 5681913457 is 7543191865.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5681913457 - 2¹⁵ = 5681880689 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5681913457.

It is not an unprimeable number, because it can be changed into a prime (5681913427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258268783 + ... + 258268804.

It is an arithmetic number, because the mean of its divisors is an integer number (1549612764).

Almost surely, 2^5681913457 is an apocalyptic number.

It is an amenable number.

5681913457 is a deficient number, since it is larger than the sum of its proper divisors (516537599).

5681913457 is a wasteful number, since it uses less digits than its factorization.

5681913457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516537598.

The product of its digits is 907200, while the sum is 49.

The square root of 5681913457 is about 75378.4681258514. The cubic root of 5681913457 is about 1784.4246126484.

The spelling of 5681913457 in words is "five billion, six hundred eighty-one million, nine hundred thirteen thousand, four hundred fifty-seven".