2145554560 has 64 divisors (see below), whose sum is σ = 5306131800. Its totient is φ = 828620800.

The previous prime is 2145554527. The next prime is 2145554569. The reversal of 2145554560 is 654555412.

It can be written as a sum of positive squares in 4 ways, for example, as 2137397824 + 8156736 = 46232^2 + 2856^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (2145554569) 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, 39241 + ... + 76360.

Almost surely, 2^2145554560 is an apocalyptic number.

2145554560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2145554560 is an abundant number, since it is smaller than the sum of its proper divisors (3160577240).

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

2145554560 is a wasteful number, since it uses less digits than its factorization.

2145554560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115649 (or 115637 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 37.

The square root of 2145554560 is about 46320.1312606085. The cubic root of 2145554560 is about 1289.7727220131.

The spelling of 2145554560 in words is "two billion, one hundred forty-five million, five hundred fifty-four thousand, five hundred sixty".