7901220018689 has 8 divisors (see below), whose sum is σ = 8156137866240. Its totient is φ = 7646304657600.

The previous prime is 7901220018631. The next prime is 7901220018697. The reversal of 7901220018689 is 9868100221097.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7901220018689 - 2²⁴ = 7901203241473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7901220018689.

It is not an unprimeable number, because it can be changed into a prime (7901220018089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7535609 + ... + 8519849.

It is an arithmetic number, because the mean of its divisors is an integer number (1019517233280).

Almost surely, 2^{7901220018689} is an apocalyptic number.

It is an amenable number.

7901220018689 is a deficient number, since it is larger than the sum of its proper divisors (254917847551).

7901220018689 is a wasteful number, since it uses less digits than its factorization.

7901220018689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243231.

The product of its (nonzero) digits is 870912, while the sum is 53.

The spelling of 7901220018689 in words is "seven trillion, nine hundred one billion, two hundred twenty million, eighteen thousand, six hundred eighty-nine".