40139805005 has 16 divisors (see below), whose sum is σ = 48724513200. Its totient is φ = 31740910080.

The previous prime is 40139805001. The next prime is 40139805029. The reversal of 40139805005 is 50050893104.

It can be written as a sum of positive squares in 8 ways, for example, as 3194736484 + 36945068521 = 56522^2 + 192211^2 .

It is not a de Polignac number, because 40139805005 - 2² = 40139805001 is a prime.

It is a super-2 number, since 2×40139805005² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40139805001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1580951 + ... + 1606139.

It is an arithmetic number, because the mean of its divisors is an integer number (3045282075).

Almost surely, 2^40139805005 is an apocalyptic number.

It is an amenable number.

40139805005 is a deficient number, since it is larger than the sum of its proper divisors (8584708195).

40139805005 is a wasteful number, since it uses less digits than its factorization.

40139805005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28864.

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 40139805005 in words is "forty billion, one hundred thirty-nine million, eight hundred five thousand, five".