15643162464 has 96 divisors (see below), whose sum is σ = 42483216384. Its totient is φ = 5034839040.

The previous prime is 15643162453. The next prime is 15643162487. The reversal of 15643162464 is 46426134651.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

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, 1372212 + ... + 1383564.

It is an arithmetic number, because the mean of its divisors is an integer number (442533504).

Almost surely, 2^15643162464 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 15643162464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21241608192).

15643162464 is an abundant number, since it is smaller than the sum of its proper divisors (26840053920).

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

15643162464 is a wasteful number, since it uses less digits than its factorization.

15643162464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11860 (or 11852 counting only the distinct ones).

The product of its digits is 414720, while the sum is 42.

The spelling of 15643162464 in words is "fifteen billion, six hundred forty-three million, one hundred sixty-two thousand, four hundred sixty-four".