15207321428989 has 8 divisors (see below), whose sum is σ = 15490439785080. Its totient is φ = 14926697508096.

The previous prime is 15207321428921. The next prime is 15207321428993. The reversal of 15207321428989 is 98982412370251.

It can be written as a sum of positive squares in 4 ways, for example, as 116683728100 + 15090637700889 = 341590^2 + 3884667^2 .

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 15207321428989 - 2⁷ = 15207321428861 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 (15207321428489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 623596494 + ... + 623620879.

It is an arithmetic number, because the mean of its divisors is an integer number (1936304973135).

Almost surely, 2^{15207321428989} is an apocalyptic number.

It is an amenable number.

15207321428989 is a deficient number, since it is larger than the sum of its proper divisors (283118356091).

15207321428989 is a wasteful number, since it uses less digits than its factorization.

15207321428989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247217599.

The product of its (nonzero) digits is 17418240, while the sum is 61.

The spelling of 15207321428989 in words is "fifteen trillion, two hundred seven billion, three hundred twenty-one million, four hundred twenty-eight thousand, nine hundred eighty-nine".