2651271205651 has 4 divisors (see below), whose sum is σ = 2668158283552. Its totient is φ = 2634384127752.

The previous prime is 2651271205643. The next prime is 2651271205753. The reversal of 2651271205651 is 1565021721562.

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

It is a cyclic number.

It is not a de Polignac number, because 2651271205651 - 2³ = 2651271205643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2651271205598 and 2651271205607.

It is not an unprimeable number, because it can be changed into a prime (2651271205621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8443538715 + ... + 8443539028.

It is an arithmetic number, because the mean of its divisors is an integer number (667039570888).

Almost surely, 2^{2651271205651} is an apocalyptic number.

2651271205651 is a deficient number, since it is larger than the sum of its proper divisors (16887077901).

2651271205651 is a wasteful number, since it uses less digits than its factorization.

2651271205651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16887077900.

The product of its (nonzero) digits is 252000, while the sum is 43.

The spelling of 2651271205651 in words is "two trillion, six hundred fifty-one billion, two hundred seventy-one million, two hundred five thousand, six hundred fifty-one".