15771459428989 has 12 divisors (see below), whose sum is σ = 17336715653628. Its totient is φ = 14336743773440.

The previous prime is 15771459428947. The next prime is 15771459428993. The reversal of 15771459428989 is 98982495417751.

It can be written as a sum of positive squares in 2 ways, for example, as 15206958152100 + 564501276889 = 3899610^2 + 751333^2 .

It is not a de Polignac number, because 15771459428989 - 2⁷ = 15771459428861 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 (15771459428909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2459284 + ... + 6131149.

It is an arithmetic number, because the mean of its divisors is an integer number (1444726304469).

Almost surely, 2^{15771459428989} is an apocalyptic number.

It is an amenable number.

15771459428989 is a deficient number, since it is larger than the sum of its proper divisors (1565256224639).

15771459428989 is a wasteful number, since it uses less digits than its factorization.

15771459428989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8605628 (or 8605617 counting only the distinct ones).

The product of its digits is 1828915200, while the sum is 79.

The spelling of 15771459428989 in words is "fifteen trillion, seven hundred seventy-one billion, four hundred fifty-nine million, four hundred twenty-eight thousand, nine hundred eighty-nine".