2171366480 has 80 divisors (see below), whose sum is σ = 5517932544. Its totient is φ = 791070720.

The previous prime is 2171366473. The next prime is 2171366507. The reversal of 2171366480 is 846631712.

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

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, 16409 + ... + 67911.

Almost surely, 2^2171366480 is an apocalyptic number.

2171366480 is a gapful number since it is divisible by the number (20) 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 2171366480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2758966272).

2171366480 is an abundant number, since it is smaller than the sum of its proper divisors (3346566064).

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

2171366480 is a wasteful number, since it uses less digits than its factorization.

2171366480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51564 (or 51558 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 2171366480 is about 46597.9235588883. The cubic root of 2171366480 is about 1294.9242871016.

The spelling of 2171366480 in words is "two billion, one hundred seventy-one million, three hundred sixty-six thousand, four hundred eighty".