7215730942989 has 4 divisors (see below), whose sum is σ = 9620974590656. Its totient is φ = 4810487295324.

The previous prime is 7215730942957. The next prime is 7215730943023. The reversal of 7215730942989 is 9892490375127.

It is a happy number.

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 not a de Polignac number, because 7215730942989 - 2⁵ = 7215730942957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7215730942489) 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, 1202621823829 + ... + 1202621823834.

It is an arithmetic number, because the mean of its divisors is an integer number (2405243647664).

Almost surely, 2^{7215730942989} is an apocalyptic number.

It is an amenable number.

7215730942989 is a deficient number, since it is larger than the sum of its proper divisors (2405243647667).

7215730942989 is a wasteful number, since it uses less digits than its factorization.

7215730942989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2405243647666.

The product of its (nonzero) digits is 68584320, while the sum is 66.

The spelling of 7215730942989 in words is "seven trillion, two hundred fifteen billion, seven hundred thirty million, nine hundred forty-two thousand, nine hundred eighty-nine".