2265646551 has 16 divisors (see below), whose sum is σ = 3510931200. Its totient is φ = 1272711168.

The previous prime is 2265646531. The next prime is 2265646553. The reversal of 2265646551 is 1556465622.

It is a happy number.

It is not a de Polignac number, because 2265646551 - 2¹⁹ = 2265122263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2265646553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 913066 + ... + 915543.

It is an arithmetic number, because the mean of its divisors is an integer number (219433200).

Almost surely, 2^2265646551 is an apocalyptic number.

2265646551 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2265646551 is a deficient number, since it is larger than the sum of its proper divisors (1245284649).

2265646551 is a wasteful number, since it uses less digits than its factorization.

2265646551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828678.

The product of its digits is 432000, while the sum is 42.

The square root of 2265646551 is about 47598.8082939058. The cubic root of 2265646551 is about 1313.4011325265.

The spelling of 2265646551 in words is "two billion, two hundred sixty-five million, six hundred forty-six thousand, five hundred fifty-one".