15478311280 has 80 divisors (see below), whose sum is σ = 36183068064. Its totient is φ = 6157721600.

The previous prime is 15478311239. The next prime is 15478311287. The reversal of 15478311280 is 8211387451.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15478311287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18060612 + ... + 18061468.

Almost surely, 2^15478311280 is an apocalyptic number.

15478311280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15478311280 is an abundant number, since it is smaller than the sum of its proper divisors (20704756784).

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

15478311280 is a wasteful number, since it uses less digits than its factorization.

15478311280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834 (or 1828 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The spelling of 15478311280 in words is "fifteen billion, four hundred seventy-eight million, three hundred eleven thousand, two hundred eighty".