15497448779 has 8 divisors (see below), whose sum is σ = 15960647520. Its totient is φ = 15036584256.

The previous prime is 15497448763. The next prime is 15497448859. The reversal of 15497448779 is 97784479451.

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 15497448779 - 2⁴ = 15497448763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15497448479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 570074 + ... + 596639.

It is an arithmetic number, because the mean of its divisors is an integer number (1995080940).

Almost surely, 2^15497448779 is an apocalyptic number.

15497448779 is a deficient number, since it is larger than the sum of its proper divisors (463198741).

15497448779 is a wasteful number, since it uses less digits than its factorization.

15497448779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167109.

The product of its digits is 71124480, while the sum is 65.

The spelling of 15497448779 in words is "fifteen billion, four hundred ninety-seven million, four hundred forty-eight thousand, seven hundred seventy-nine".