2155929669 has 8 divisors (see below), whose sum is σ = 3193969920. Its totient is φ = 1437286428.

The previous prime is 2155929641. The next prime is 2155929683. The reversal of 2155929669 is 9669295512.

2155929669 is a `hidden beast` number, since 2 + 1 + 559 + 29 + 6 + 69 = 666.

It is not a de Polignac number, because 2155929669 - 2⁵ = 2155929637 is a prime.

It is a super-2 number, since 2×2155929669² = 9296065475348899122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155929619) 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, 39924597 + ... + 39924650.

It is an arithmetic number, because the mean of its divisors is an integer number (399246240).

Almost surely, 2^2155929669 is an apocalyptic number.

It is an amenable number.

2155929669 is a deficient number, since it is larger than the sum of its proper divisors (1038040251).

2155929669 is an equidigital number, since it uses as much as digits as its factorization.

2155929669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79849256 (or 79849250 counting only the distinct ones).

The product of its digits is 2624400, while the sum is 54.

The square root of 2155929669 is about 46431.9897161429. The cubic root of 2155929669 is about 1291.8483347244.

The spelling of 2155929669 in words is "two billion, one hundred fifty-five million, nine hundred twenty-nine thousand, six hundred sixty-nine".