2651861473 has 4 divisors (see below), whose sum is σ = 2672742400. Its totient is φ = 2630980548.

The previous prime is 2651861453. The next prime is 2651861491. The reversal of 2651861473 is 3741681562.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2651861473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2651861453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10440273 + ... + 10440526.

It is an arithmetic number, because the mean of its divisors is an integer number (668185600).

Almost surely, 2^2651861473 is an apocalyptic number.

It is an amenable number.

2651861473 is a deficient number, since it is larger than the sum of its proper divisors (20880927).

2651861473 is a wasteful number, since it uses less digits than its factorization.

2651861473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20880926.

The product of its digits is 241920, while the sum is 43.

The square root of 2651861473 is about 51496.2277550502. The cubic root of 2651861473 is about 1384.1514476213.

The spelling of 2651861473 in words is "two billion, six hundred fifty-one million, eight hundred sixty-one thousand, four hundred seventy-three".