1627481680 has 80 divisors (see below), whose sum is σ = 4168983168. Its totient is φ = 585920000.

The previous prime is 1627481641. The next prime is 1627481683. The reversal of 1627481680 is 861847261.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1627481683) 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, 79725 + ... + 98035.

Almost surely, 2^1627481680 is an apocalyptic number.

1627481680 is a gapful number since it is divisible by the number (10) 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 1627481680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2084491584).

1627481680 is an abundant number, since it is smaller than the sum of its proper divisors (2541501488).

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

1627481680 is a wasteful number, since it uses less digits than its factorization.

1627481680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18436 (or 18430 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 1627481680 is about 40342.0584502080. The cubic root of 1627481680 is about 1176.2655276833.

The spelling of 1627481680 in words is "one billion, six hundred twenty-seven million, four hundred eighty-one thousand, six hundred eighty".