40442154523 has 4 divisors (see below), whose sum is σ = 40451627808. Its totient is φ = 40432681240.

The previous prime is 40442154491. The next prime is 40442154583. The reversal of 40442154523 is 32545124404.

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

It is a cyclic number.

It is not a de Polignac number, because 40442154523 - 2⁵ = 40442154491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40442154583) 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 3 ways as a sum of consecutive naturals, for example, 4730236 + ... + 4738777.

It is an arithmetic number, because the mean of its divisors is an integer number (10112906952).

Almost surely, 2^40442154523 is an apocalyptic number.

40442154523 is a deficient number, since it is larger than the sum of its proper divisors (9473285).

40442154523 is an equidigital number, since it uses as much as digits as its factorization.

40442154523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9473284.

The product of its (nonzero) digits is 76800, while the sum is 34.

Adding to 40442154523 its reverse (32545124404), we get a palindrome (72987278927).

The spelling of 40442154523 in words is "forty billion, four hundred forty-two million, one hundred fifty-four thousand, five hundred twenty-three".