7943215949609 has 4 divisors (see below), whose sum is σ = 7943469603840. Its totient is φ = 7942962295380.

The previous prime is 7943215949549. The next prime is 7943215949633. The reversal of 7943215949609 is 9069495123497.

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 7943215949609 - 2²⁸ = 7942947514153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7943215946609) 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, 126780137 + ... + 126842774.

It is an arithmetic number, because the mean of its divisors is an integer number (1985867400960).

Almost surely, 2^{7943215949609} is an apocalyptic number.

It is an amenable number.

7943215949609 is a deficient number, since it is larger than the sum of its proper divisors (253654231).

7943215949609 is a wasteful number, since it uses less digits than its factorization.

7943215949609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253654230.

The product of its (nonzero) digits is 132269760, while the sum is 68.

The spelling of 7943215949609 in words is "seven trillion, nine hundred forty-three billion, two hundred fifteen million, nine hundred forty-nine thousand, six hundred nine".