40139394105 has 8 divisors (see below), whose sum is σ = 64223030592. Its totient is φ = 21407676848.

The previous prime is 40139394079. The next prime is 40139394107. The reversal of 40139394105 is 50149393104.

It is a happy number.

40139394105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40139394105 - 2¹² = 40139390009 is a prime.

It is a super-2 number, since 2×40139394105² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40139394107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1337979789 + ... + 1337979818.

It is an arithmetic number, because the mean of its divisors is an integer number (8027878824).

Almost surely, 2^40139394105 is an apocalyptic number.

It is an amenable number.

40139394105 is a deficient number, since it is larger than the sum of its proper divisors (24083636487).

40139394105 is a wasteful number, since it uses less digits than its factorization.

40139394105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675959615.

The product of its (nonzero) digits is 58320, while the sum is 39.

The spelling of 40139394105 in words is "forty billion, one hundred thirty-nine million, three hundred ninety-four thousand, one hundred five".