40781855930 has 24 divisors (see below), whose sum is σ = 77474236212. Its totient is φ = 15454175616.

The previous prime is 40781855899. The next prime is 40781855941. The reversal of 40781855930 is 3955818704.

It can be written as a sum of positive squares in 2 ways, for example, as 38320803049 + 2461052881 = 195757^2 + 49609^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5644847 + ... + 5652066.

Almost surely, 2^40781855930 is an apocalyptic number.

40781855930 is a deficient number, since it is larger than the sum of its proper divisors (36692380282).

40781855930 is a wasteful number, since it uses less digits than its factorization.

40781855930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11296958 (or 11296939 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 50.

The spelling of 40781855930 in words is "forty billion, seven hundred eighty-one million, eight hundred fifty-five thousand, nine hundred thirty".