2155673520 has 640 divisors, whose sum is σ = 9979361280. Its totient is φ = 413061120.

The previous prime is 2155673503. The next prime is 2155673521. The reversal of 2155673520 is 253765512.

2155673520 is a `hidden beast` number, since 2 + 15 + 56 + 73 + 520 = 666.

2155673520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2155673521) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2161662 + ... + 2162658.

It is an arithmetic number, because the mean of its divisors is an integer number (15592752).

Almost surely, 2^2155673520 is an apocalyptic number.

2155673520 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 2155673520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4989680640).

2155673520 is an abundant number, since it is smaller than the sum of its proper divisors (7823687760).

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

2155673520 is a wasteful number, since it uses less digits than its factorization.

2155673520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050 (or 1038 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The square root of 2155673520 is about 46429.2313095963. The cubic root of 2155673520 is about 1291.7971705995.

The spelling of 2155673520 in words is "two billion, one hundred fifty-five million, six hundred seventy-three thousand, five hundred twenty".