2155725769 has 8 divisors (see below), whose sum is σ = 2292580640. Its totient is φ = 2021210496.

The previous prime is 2155725739. The next prime is 2155725773. The reversal of 2155725769 is 9675275512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2155725769 - 2³¹ = 8242121 is a prime.

It is a super-2 number, since 2×2155725769² = 9294307182261282722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2155725739) 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, 582999 + ... + 586684.

It is an arithmetic number, because the mean of its divisors is an integer number (286572580).

Almost surely, 2^2155725769 is an apocalyptic number.

It is an amenable number.

2155725769 is a deficient number, since it is larger than the sum of its proper divisors (136854871).

2155725769 is a wasteful number, since it uses less digits than its factorization.

2155725769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169799.

The product of its digits is 1323000, while the sum is 49.

The square root of 2155725769 is about 46429.7939797281. The cubic root of 2155725769 is about 1291.8076073322.

The spelling of 2155725769 in words is "two billion, one hundred fifty-five million, seven hundred twenty-five thousand, seven hundred sixty-nine".