40442011993 has 4 divisors (see below), whose sum is σ = 42570538960. Its totient is φ = 38313485028.

The previous prime is 40442011991. The next prime is 40442011999. The reversal of 40442011993 is 39911024404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40442011993 - 2¹ = 40442011991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40442011991) 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, 1064263455 + ... + 1064263492.

It is an arithmetic number, because the mean of its divisors is an integer number (10642634740).

Almost surely, 2^40442011993 is an apocalyptic number.

It is an amenable number.

40442011993 is a deficient number, since it is larger than the sum of its proper divisors (2128526967).

40442011993 is a wasteful number, since it uses less digits than its factorization.

40442011993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128526966.

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 40442011993 in words is "forty billion, four hundred forty-two million, eleven thousand, nine hundred ninety-three".