2651662505 has 4 divisors (see below), whose sum is σ = 3181995012. Its totient is φ = 2121330000.

The previous prime is 2651662471. The next prime is 2651662513. The reversal of 2651662505 is 5052661562.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 801286249 + 1850376256 = 28307^2 + 43016^2 .

It is not a de Polignac number, because 2651662505 - 2⁶ = 2651662441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265166246 + ... + 265166255.

It is an arithmetic number, because the mean of its divisors is an integer number (795498753).

Almost surely, 2^2651662505 is an apocalyptic number.

It is an amenable number.

2651662505 is a deficient number, since it is larger than the sum of its proper divisors (530332507).

2651662505 is an equidigital number, since it uses as much as digits as its factorization.

2651662505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530332506.

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 2651662505 is about 51494.2958491521. The cubic root of 2651662505 is about 1384.1168293307.

The spelling of 2651662505 in words is "two billion, six hundred fifty-one million, six hundred sixty-two thousand, five hundred five".