40399628913 has 12 divisors (see below), whose sum is σ = 66691451008. Its totient is φ = 23085502200.

The previous prime is 40399628891. The next prime is 40399628957. The reversal of 40399628913 is 31982699304.

40399628913 is a `hidden beast` number, since 4 + 0 + 3 + 9 + 9 + 628 + 9 + 1 + 3 = 666.

It is not a de Polignac number, because 40399628913 - 2⁸ = 40399628657 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40399628913.

It is not an unprimeable number, because it can be changed into a prime (40399628963) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 320631913 + ... + 320632038.

Almost surely, 2^40399628913 is an apocalyptic number.

It is an amenable number.

40399628913 is a deficient number, since it is larger than the sum of its proper divisors (26291822095).

40399628913 is a wasteful number, since it uses less digits than its factorization.

40399628913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641263964 (or 641263961 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 54.

The spelling of 40399628913 in words is "forty billion, three hundred ninety-nine million, six hundred twenty-eight thousand, nine hundred thirteen".