40520407689 has 24 divisors (see below), whose sum is σ = 60238694880. Its totient is φ = 26235770112.

The previous prime is 40520407679. The next prime is 40520407769. The reversal of 40520407689 is 98670402504.

It is a happy number.

40520407689 is a `hidden beast` number, since 4 + 0 + 520 + 40 + 7 + 6 + 89 = 666.

40520407689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40520407689 - 2⁹ = 40520407177 is a prime.

It is a super-3 number, since 3×40520407689³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (40520407649) 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, 415624 + ... + 503769.

It is an arithmetic number, because the mean of its divisors is an integer number (2509945620).

Almost surely, 2^40520407689 is an apocalyptic number.

It is an amenable number.

40520407689 is a deficient number, since it is larger than the sum of its proper divisors (19718287191).

40520407689 is a wasteful number, since it uses less digits than its factorization.

40520407689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919541 (or 919538 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 40520407689 in words is "forty billion, five hundred twenty million, four hundred seven thousand, six hundred eighty-nine".