5605750781 has 4 divisors (see below), whose sum is σ = 5606121312. Its totient is φ = 5605380252.

The previous prime is 5605750757. The next prime is 5605750807. The reversal of 5605750781 is 1870575065.

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 a de Polignac number, because none of the positive numbers 2^k-5605750781 is a prime.

It is a super-2 number, since 2×5605750781² = 62848883637364219922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5605750751) 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, 161561 + ... + 193166.

It is an arithmetic number, because the mean of its divisors is an integer number (1401530328).

Almost surely, 2^5605750781 is an apocalyptic number.

It is an amenable number.

5605750781 is a deficient number, since it is larger than the sum of its proper divisors (370531).

5605750781 is a wasteful number, since it uses less digits than its factorization.

5605750781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370530.

The product of its (nonzero) digits is 294000, while the sum is 44.

The square root of 5605750781 is about 74871.5618976925. The cubic root of 5605750781 is about 1776.4156695072.

The spelling of 5605750781 in words is "five billion, six hundred five million, seven hundred fifty thousand, seven hundred eighty-one".