43788761506 has 12 divisors (see below), whose sum is σ = 76406920758. Its totient is φ = 18766612032.

The previous prime is 43788761503. The next prime is 43788761543. The reversal of 43788761506 is 60516788734.

It can be written as a sum of positive squares in only one way, i.e., 43405972281 + 382789225 = 208341^2 + 19565^2 .

It is not an unprimeable number, because it can be changed into a prime (43788761501) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 223411951 + ... + 223412146.

Almost surely, 2^43788761506 is an apocalyptic number.

43788761506 is a deficient number, since it is larger than the sum of its proper divisors (32618159252).

43788761506 is a wasteful number, since it uses less digits than its factorization.

43788761506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446824113 (or 446824106 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 55.

The spelling of 43788761506 in words is "forty-three billion, seven hundred eighty-eight million, seven hundred sixty-one thousand, five hundred six".