1649267441657 has 8 divisors (see below), whose sum is σ = 1837481715072. Its totient is φ = 1467433313200.

The previous prime is 1649267441651. The next prime is 1649267441681. The reversal of 1649267441657 is 7561447629461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1649267441657 - 2⁴ = 1649267441641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1649267441657.

It is not an unprimeable number, because it can be changed into a prime (1649267441651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1595035694 + ... + 1595036727.

It is an arithmetic number, because the mean of its divisors is an integer number (229685214384).

Almost surely, 2^{1649267441657} is an apocalyptic number.

It is an amenable number.

1649267441657 is a deficient number, since it is larger than the sum of its proper divisors (188214273415).

1649267441657 is a wasteful number, since it uses less digits than its factorization.

1649267441657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3190072479.

The product of its digits is 60963840, while the sum is 62.

The spelling of 1649267441657 in words is "one trillion, six hundred forty-nine billion, two hundred sixty-seven million, four hundred forty-one thousand, six hundred fifty-seven".