2655830781 has 8 divisors (see below), whose sum is σ = 3934564160. Its totient is φ = 1770553836.

The previous prime is 2655830761. The next prime is 2655830783. The reversal of 2655830781 is 1870385562.

2655830781 is a `hidden beast` number, since 2 + 65 + 583 + 0 + 7 + 8 + 1 = 666.

It is not a de Polignac number, because 2655830781 - 2¹¹ = 2655828733 is a prime.

It is a super-2 number, since 2×2655830781² = 14106874274614139922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2655830783) 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, 49182025 + ... + 49182078.

It is an arithmetic number, because the mean of its divisors is an integer number (491820520).

Almost surely, 2^2655830781 is an apocalyptic number.

It is an amenable number.

2655830781 is a deficient number, since it is larger than the sum of its proper divisors (1278733379).

2655830781 is an equidigital number, since it uses as much as digits as its factorization.

2655830781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98364112 (or 98364106 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The square root of 2655830781 is about 51534.7531380524. The cubic root of 2655830781 is about 1384.8417029438.

The spelling of 2655830781 in words is "two billion, six hundred fifty-five million, eight hundred thirty thousand, seven hundred eighty-one".