2644134339851 has 4 divisors (see below), whose sum is σ = 2694023667072. Its totient is φ = 2594245012632.

The previous prime is 2644134339809. The next prime is 2644134339857. The reversal of 2644134339851 is 1589334314462.

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 2644134339851 - 2³⁰ = 2643060598027 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53), and also a Moran number because the ratio is a prime number: 49889327167 = 2644134339851 / (2 + 6 + 4 + 4 + 1 + 3 + 4 + 3 + 3 + 9 + 8 + 5 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2644134339793 and 2644134339802.

It is not an unprimeable number, because it can be changed into a prime (2644134339857) 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, 24944663531 + ... + 24944663636.

It is an arithmetic number, because the mean of its divisors is an integer number (673505916768).

Almost surely, 2^{2644134339851} is an apocalyptic number.

2644134339851 is a deficient number, since it is larger than the sum of its proper divisors (49889327221).

2644134339851 is an equidigital number, since it uses as much as digits as its factorization.

2644134339851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49889327220.

The product of its digits is 7464960, while the sum is 53.

The spelling of 2644134339851 in words is "two trillion, six hundred forty-four billion, one hundred thirty-four million, three hundred thirty-nine thousand, eight hundred fifty-one".