2605651401 has 16 divisors (see below), whose sum is σ = 3607769088. Its totient is φ = 1670989200.

The previous prime is 2605651381. The next prime is 2605651403. The reversal of 2605651401 is 1041565062.

It is not a de Polignac number, because 2605651401 - 2⁶ = 2605651337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2605651403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68355 + ... + 99416.

It is an arithmetic number, because the mean of its divisors is an integer number (225485568).

Almost surely, 2^2605651401 is an apocalyptic number.

It is an amenable number.

2605651401 is a deficient number, since it is larger than the sum of its proper divisors (1002117687).

2605651401 is a wasteful number, since it uses less digits than its factorization.

2605651401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167972.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 2605651401 is about 51045.5816011533. The cubic root of 2605651401 is about 1376.0644365514.

The spelling of 2605651401 in words is "two billion, six hundred five million, six hundred fifty-one thousand, four hundred one".