15515476480 has 80 divisors (see below), whose sum is σ = 42515225280. Its totient is φ = 5319585792.

The previous prime is 15515476387. The next prime is 15515476481. The reversal of 15515476480 is 8467451551.

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

It is a self number, because there is not a number n which added to its sum of digits gives 15515476480.

It is not an unprimeable number, because it can be changed into a prime (15515476481) 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, 414990 + ... + 450829.

It is an arithmetic number, because the mean of its divisors is an integer number (531440316).

Almost surely, 2^15515476480 is an apocalyptic number.

15515476480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15515476480 is an abundant number, since it is smaller than the sum of its proper divisors (26999748800).

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

15515476480 is an frugal number, since it uses more digits than its factorization.

15515476480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865849 (or 865833 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 46.

The spelling of 15515476480 in words is "fifteen billion, five hundred fifteen million, four hundred seventy-six thousand, four hundred eighty".