2645426181 has 8 divisors (see below), whose sum is σ = 3538363104. Its totient is φ = 1758053360.

The previous prime is 2645426171. The next prime is 2645426207. The reversal of 2645426181 is 1816245462.

It is a happy number.

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 2645426181 - 2⁷ = 2645426053 is a prime.

It is a super-2 number, since 2×2645426181² = 13996559358240489522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2645426141) 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, 1389915 + ... + 1391816.

It is an arithmetic number, because the mean of its divisors is an integer number (442295388).

Almost surely, 2^2645426181 is an apocalyptic number.

It is an amenable number.

2645426181 is a deficient number, since it is larger than the sum of its proper divisors (892936923).

2645426181 is a wasteful number, since it uses less digits than its factorization.

2645426181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2782051.

The product of its digits is 92160, while the sum is 39.

The square root of 2645426181 is about 51433.7066620713. The cubic root of 2645426181 is about 1383.0308971713.

The spelling of 2645426181 in words is "two billion, six hundred forty-five million, four hundred twenty-six thousand, one hundred eighty-one".