1646402521352 has 16 divisors (see below), whose sum is σ = 3087022515900. Its totient is φ = 823196517120.

The previous prime is 1646402521349. The next prime is 1646402521403. The reversal of 1646402521352 is 2531252046461.

It can be written as a sum of positive squares in 2 ways, for example, as 1552481112196 + 93921409156 = 1245986^2 + 306466^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1201652 + ... + 2176412.

Almost surely, 2^{1646402521352} is an apocalyptic number.

It is an amenable number.

1646402521352 is a deficient number, since it is larger than the sum of its proper divisors (1440619994548).

1646402521352 is a wasteful number, since it uses less digits than its factorization.

1646402521352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185896 (or 1185892 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 1646402521352 in words is "one trillion, six hundred forty-six billion, four hundred two million, five hundred twenty-one thousand, three hundred fifty-two".