1646432257132 has 96 divisors (see below), whose sum is σ = 3383935672320. Its totient is φ = 694913506560.

The previous prime is 1646432257003. The next prime is 1646432257133. The reversal of 1646432257132 is 2317522346461.

It is not an unprimeable number, because it can be changed into a prime (1646432257133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1822483 + ... + 2571829.

It is an arithmetic number, because the mean of its divisors is an integer number (35249329920).

Almost surely, 2^{1646432257132} is an apocalyptic number.

It is an amenable number.

1646432257132 is an abundant number, since it is smaller than the sum of its proper divisors (1737503415188).

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

1646432257132 is a wasteful number, since it uses less digits than its factorization.

1646432257132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749471 (or 749469 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 46.

The spelling of 1646432257132 in words is "one trillion, six hundred forty-six billion, four hundred thirty-two million, two hundred fifty-seven thousand, one hundred thirty-two".