40781888930 has 24 divisors (see below), whose sum is σ = 74087256852. Its totient is φ = 16163050176.

The previous prime is 40781888921. The next prime is 40781888941. The reversal of 40781888930 is 3988818704.

It can be written as a sum of positive squares in 6 ways, for example, as 35712306529 + 5069582401 = 188977^2 + 71201^2 .

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, 52817 + ... + 290436.

Almost surely, 2^40781888930 is an apocalyptic number.

40781888930 is a deficient number, since it is larger than the sum of its proper divisors (33305367922).

40781888930 is a wasteful number, since it uses less digits than its factorization.

40781888930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343478 (or 343369 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 56.

The spelling of 40781888930 in words is "forty billion, seven hundred eighty-one million, eight hundred eighty-eight thousand, nine hundred thirty".