1646537763 has 12 divisors (see below), whose sum is σ = 2377250520. Its totient is φ = 1013253696.

The previous prime is 1646537749. The next prime is 1646537773. The reversal of 1646537763 is 3677356461.

It is not a de Polignac number, because 1646537763 - 2¹⁴ = 1646521379 is a prime.

It is a super-2 number, since 2×1646537763² = 5422173209970088338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1646537723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1623298 + ... + 1624311.

It is an arithmetic number, because the mean of its divisors is an integer number (198104210).

Almost surely, 2^1646537763 is an apocalyptic number.

1646537763 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1646537763 is a deficient number, since it is larger than the sum of its proper divisors (730712757).

1646537763 is a wasteful number, since it uses less digits than its factorization.

1646537763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3247638 (or 3247625 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 48.

The square root of 1646537763 is about 40577.5524520639. The cubic root of 1646537763 is about 1180.8386652585.

The spelling of 1646537763 in words is "one billion, six hundred forty-six million, five hundred thirty-seven thousand, seven hundred sixty-three".