8043554781 has 24 divisors (see below), whose sum is σ = 11725086464. Its totient is φ = 5313353760.

The previous prime is 8043554773. The next prime is 8043554789. The reversal of 8043554781 is 1874553408.

8043554781 is nontrivially palindromic in base 4.

It is an interprime number because it is at equal distance from previous prime (8043554773) and next prime (8043554789).

It is not a de Polignac number, because 8043554781 - 2³ = 8043554773 is a prime.

It is a super-2 number, since 2×8043554781² (a number of 21 digits) 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 Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8043554789) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 510816 + ... + 526326.

Almost surely, 2^8043554781 is an apocalyptic number.

It is an amenable number.

8043554781 is a deficient number, since it is larger than the sum of its proper divisors (3681531683).

8043554781 is a wasteful number, since it uses less digits than its factorization.

8043554781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16041 (or 16038 counting only the distinct ones).

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

The square root of 8043554781 is about 89685.8672311307. The cubic root of 8043554781 is about 2003.6229980629.

The spelling of 8043554781 in words is "eight billion, forty-three million, five hundred fifty-four thousand, seven hundred eighty-one".