2165907548 has 12 divisors (see below), whose sum is σ = 4331815152. Its totient is φ = 928246080.

The previous prime is 2165907503. The next prime is 2165907553. The reversal of 2165907548 is 8457095612.

It is a happy number.

2165907548 is an admirable number.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38676893 + ... + 38676948.

It is an arithmetic number, because the mean of its divisors is an integer number (360984596).

Almost surely, 2^2165907548 is an apocalyptic number.

2165907548 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2165907548 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2165907548 is a wasteful number, since it uses less digits than its factorization.

2165907548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77353852 (or 77353850 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 47.

The square root of 2165907548 is about 46539.3118556775. The cubic root of 2165907548 is about 1293.8382066926.

The spelling of 2165907548 in words is "two billion, one hundred sixty-five million, nine hundred seven thousand, five hundred forty-eight".