42719673649 has 4 divisors (see below), whose sum is σ = 43045778160. Its totient is φ = 42393569140.

The previous prime is 42719673613. The next prime is 42719673719. The reversal of 42719673649 is 94637691724.

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 a cyclic number.

It is not a de Polignac number, because 42719673649 - 2²³ = 42711285041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42719673593 and 42719673602.

It is not an unprimeable number, because it can be changed into a prime (42719670649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163052059 + ... + 163052320.

It is an arithmetic number, because the mean of its divisors is an integer number (10761444540).

Almost surely, 2^42719673649 is an apocalyptic number.

It is an amenable number.

42719673649 is a deficient number, since it is larger than the sum of its proper divisors (326104511).

42719673649 is a wasteful number, since it uses less digits than its factorization.

42719673649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326104510.

The product of its digits is 13716864, while the sum is 58.

The spelling of 42719673649 in words is "forty-two billion, seven hundred nineteen million, six hundred seventy-three thousand, six hundred forty-nine".