5438045781 has 32 divisors (see below), whose sum is σ = 9211699200. Its totient is φ = 3105961200.

The previous prime is 5438045759. The next prime is 5438045791. The reversal of 5438045781 is 1875408345.

5438045781 is a `hidden beast` number, since 5 + 43 + 80 + 457 + 81 = 666.

It is not a de Polignac number, because 5438045781 - 2¹⁹ = 5437521493 is a prime.

It is a super-2 number, since 2×5438045781² = 59144683832503799922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5438045741) 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, 476500 + ... + 487778.

It is an arithmetic number, because the mean of its divisors is an integer number (287865600).

Almost surely, 2^5438045781 is an apocalyptic number.

It is an amenable number.

5438045781 is a deficient number, since it is larger than the sum of its proper divisors (3773653419).

5438045781 is a wasteful number, since it uses less digits than its factorization.

5438045781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13846 (or 13840 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The square root of 5438045781 is about 73743.1066676744. The cubic root of 5438045781 is about 1758.5212463835.

The spelling of 5438045781 in words is "five billion, four hundred thirty-eight million, forty-five thousand, seven hundred eighty-one".