1646551656327 has 16 divisors (see below), whose sum is σ = 2291283429120. Its totient is φ = 1049778366912.

The previous prime is 1646551656287. The next prime is 1646551656457. The reversal of 1646551656327 is 7236561556461.

It is not a de Polignac number, because 1646551656327 - 2⁷ = 1646551656199 is a prime.

It is a super-2 number, since 2×1646551656327² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1646551652327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1862502 + ... + 2600387.

It is an arithmetic number, because the mean of its divisors is an integer number (143205214320).

Almost surely, 2^{1646551656327} is an apocalyptic number.

1646551656327 is a deficient number, since it is larger than the sum of its proper divisors (644731772793).

1646551656327 is a wasteful number, since it uses less digits than its factorization.

1646551656327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4468262.

The product of its digits is 27216000, while the sum is 57.

The spelling of 1646551656327 in words is "one trillion, six hundred forty-six billion, five hundred fifty-one million, six hundred fifty-six thousand, three hundred twenty-seven".