15978548423 has 8 divisors (see below), whose sum is σ = 16035040560. Its totient is φ = 15922085760.

The previous prime is 15978548401. The next prime is 15978548447. The reversal of 15978548423 is 32484587951.

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 15978548423 - 2¹⁰ = 15978547399 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 (15978547423) 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, 2182493 + ... + 2189801.

It is an arithmetic number, because the mean of its divisors is an integer number (2004380070).

Almost surely, 2^15978548423 is an apocalyptic number.

15978548423 is a deficient number, since it is larger than the sum of its proper divisors (56492137).

15978548423 is an equidigital number, since it uses as much as digits as its factorization.

15978548423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14737.

The product of its digits is 9676800, while the sum is 56.

The spelling of 15978548423 in words is "fifteen billion, nine hundred seventy-eight million, five hundred forty-eight thousand, four hundred twenty-three".