15673657648 has 80 divisors (see below), whose sum is σ = 34634426112. Its totient is φ = 6801696000.

The previous prime is 15673657639. The next prime is 15673657651. The reversal of 15673657648 is 84675637651.

It is a junction number, because it is equal to n+sod(n) for n = 15673657592 and 15673657601.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2308018 + ... + 2314798.

Almost surely, 2^15673657648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15673657648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17317213056).

15673657648 is an abundant number, since it is smaller than the sum of its proper divisors (18960768464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15673657648 is a wasteful number, since it uses less digits than its factorization.

15673657648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7394 (or 7388 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 58.

The spelling of 15673657648 in words is "fifteen billion, six hundred seventy-three million, six hundred fifty-seven thousand, six hundred forty-eight".