1643460026672 has 40 divisors (see below), whose sum is σ = 3384628767216. Its totient is φ = 770383609856.

The previous prime is 1643460026657. The next prime is 1643460026731. The reversal of 1643460026672 is 2766200643461.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11685218 + ... + 11825025.

Almost surely, 2^{1643460026672} is an apocalyptic number.

It is an amenable number.

1643460026672 is an abundant number, since it is smaller than the sum of its proper divisors (1741168740544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1643460026672 is a wasteful number, since it uses less digits than its factorization.

1643460026672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23510525 (or 23510519 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 47.

The spelling of 1643460026672 in words is "one trillion, six hundred forty-three billion, four hundred sixty million, twenty-six thousand, six hundred seventy-two".