1649647164851 has 4 divisors (see below), whose sum is σ = 1885311045552. Its totient is φ = 1413983284152.

The previous prime is 1649647164821. The next prime is 1649647164911. The reversal of 1649647164851 is 1584617469461.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1649647164851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1649647164821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117831940340 + ... + 117831940353.

It is an arithmetic number, because the mean of its divisors is an integer number (471327761388).

Almost surely, 2^{1649647164851} is an apocalyptic number.

1649647164851 is a deficient number, since it is larger than the sum of its proper divisors (235663880701).

1649647164851 is an equidigital number, since it uses as much as digits as its factorization.

1649647164851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235663880700.

The product of its digits is 34836480, while the sum is 62.

The spelling of 1649647164851 in words is "one trillion, six hundred forty-nine billion, six hundred forty-seven million, one hundred sixty-four thousand, eight hundred fifty-one".