1643286880642 has 32 divisors (see below), whose sum is σ = 2701949646528. Its totient is φ = 743359680000.

The previous prime is 1643286880637. The next prime is 1643286880673. The reversal of 1643286880642 is 2460886823461.

It is a super-2 number, since 2×1643286880642² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8016142 + ... + 8218582.

It is an arithmetic number, because the mean of its divisors is an integer number (84435926454).

Almost surely, 2^{1643286880642} is an apocalyptic number.

1643286880642 is a deficient number, since it is larger than the sum of its proper divisors (1058662765886).

1643286880642 is a wasteful number, since it uses less digits than its factorization.

1643286880642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204226.

The product of its (nonzero) digits is 21233664, while the sum is 58.

The spelling of 1643286880642 in words is "one trillion, six hundred forty-three billion, two hundred eighty-six million, eight hundred eighty thousand, six hundred forty-two".