2655691920 has 400 divisors, whose sum is σ = 10647318528. Its totient is φ = 600929280.

The previous prime is 2655691903. The next prime is 2655691933. The reversal of 2655691920 is 291965562.

It is a happy number.

2655691920 is a `hidden beast` number, since 2 + 6 + 556 + 9 + 1 + 92 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5760490 + ... + 5760950.

Almost surely, 2^2655691920 is an apocalyptic number.

2655691920 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 2655691920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5323659264).

2655691920 is an abundant number, since it is smaller than the sum of its proper divisors (7991626608).

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

2655691920 is a wasteful number, since it uses less digits than its factorization.

2655691920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620 (or 605 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The square root of 2655691920 is about 51533.4058645458. The cubic root of 2655691920 is about 1384.8175668861.

The spelling of 2655691920 in words is "two billion, six hundred fifty-five million, six hundred ninety-one thousand, nine hundred twenty".