40438839099 has 4 divisors (see below), whose sum is σ = 53918452136. Its totient is φ = 26959226064.

The previous prime is 40438839071. The next prime is 40438839101. The reversal of 40438839099 is 99093883404.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40438839099 - 2⁷ = 40438838971 is a prime.

It is a super-2 number, since 2×40438839099² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40438839019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6739806514 + ... + 6739806519.

It is an arithmetic number, because the mean of its divisors is an integer number (13479613034).

Almost surely, 2^40438839099 is an apocalyptic number.

40438839099 is a deficient number, since it is larger than the sum of its proper divisors (13479613037).

40438839099 is a wasteful number, since it uses less digits than its factorization.

40438839099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13479613036.

The product of its (nonzero) digits is 6718464, while the sum is 57.

The spelling of 40438839099 in words is "forty billion, four hundred thirty-eight million, eight hundred thirty-nine thousand, ninety-nine".