15404040742 has 4 divisors (see below), whose sum is σ = 23106061116. Its totient is φ = 7702020370.

The previous prime is 15404040733. The next prime is 15404040749. The reversal of 15404040742 is 24704040451.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15404040749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3851010184 + ... + 3851010187.

It is an arithmetic number, because the mean of its divisors is an integer number (5776515279).

Almost surely, 2^15404040742 is an apocalyptic number.

15404040742 is a deficient number, since it is larger than the sum of its proper divisors (7702020374).

15404040742 is an equidigital number, since it uses as much as digits as its factorization.

15404040742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7702020373.

The product of its (nonzero) digits is 17920, while the sum is 31.

The spelling of 15404040742 in words is "fifteen billion, four hundred four million, forty thousand, seven hundred forty-two".