1646525658642 has 16 divisors (see below), whose sum is σ = 3293210934720. Its totient is φ = 548815283312.

The previous prime is 1646525658577. The next prime is 1646525658643. The reversal of 1646525658642 is 2468565256461.

It is a super-2 number, since 2×1646525658642² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1646525658643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6516417 + ... + 6764372.

It is an arithmetic number, because the mean of its divisors is an integer number (205825683420).

Almost surely, 2^{1646525658642} is an apocalyptic number.

1646525658642 is an abundant number, since it is smaller than the sum of its proper divisors (1646685276078).

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

1646525658642 is a wasteful number, since it uses less digits than its factorization.

1646525658642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13301457.

The product of its digits is 82944000, while the sum is 60.

The spelling of 1646525658642 in words is "one trillion, six hundred forty-six billion, five hundred twenty-five million, six hundred fifty-eight thousand, six hundred forty-two".