15478746672 has 80 divisors (see below), whose sum is σ = 40775747328. Its totient is φ = 5057944320.

The previous prime is 15478746659. The next prime is 15478746697. The reversal of 15478746672 is 27664787451.

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, 4656403 + ... + 4659725.

Almost surely, 2^15478746672 is an apocalyptic number.

15478746672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15478746672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20387873664).

15478746672 is an abundant number, since it is smaller than the sum of its proper divisors (25297000656).

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

15478746672 is a wasteful number, since it uses less digits than its factorization.

15478746672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5218 (or 5212 counting only the distinct ones).

The product of its digits is 15805440, while the sum is 57.

The spelling of 15478746672 in words is "fifteen billion, four hundred seventy-eight million, seven hundred forty-six thousand, six hundred seventy-two".