1649267441651 has 2 divisors, whose sum is σ = 1649267441652. Its totient is φ = 1649267441650.

The previous prime is 1649267441641. The next prime is 1649267441681. The reversal of 1649267441651 is 1561447629461.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1649267441651 is a prime.

It is not a weakly prime, because it can be changed into another prime (1649267441611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 824633720825 + 824633720826.

It is an arithmetic number, because the mean of its divisors is an integer number (824633720826).

Almost surely, 2^{1649267441651} is an apocalyptic number.

1649267441651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1649267441651 is an equidigital number, since it uses as much as digits as its factorization.

1649267441651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8709120, while the sum is 56.

The spelling of 1649267441651 in words is "one trillion, six hundred forty-nine billion, two hundred sixty-seven million, four hundred forty-one thousand, six hundred fifty-one".