40520426817 has 32 divisors (see below), whose sum is σ = 61262853120. Its totient is φ = 23616532800.

The previous prime is 40520426809. The next prime is 40520426839. The reversal of 40520426817 is 71862402504.

It is not a de Polignac number, because 40520426817 - 2³ = 40520426809 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (40520426917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3986692 + ... + 3996842.

It is an arithmetic number, because the mean of its divisors is an integer number (1914464160).

Almost surely, 2^40520426817 is an apocalyptic number.

It is an amenable number.

40520426817 is a deficient number, since it is larger than the sum of its proper divisors (20742426303).

40520426817 is a wasteful number, since it uses less digits than its factorization.

40520426817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15573.

The product of its (nonzero) digits is 107520, while the sum is 39.

The spelling of 40520426817 in words is "forty billion, five hundred twenty million, four hundred twenty-six thousand, eight hundred seventeen".