1642561730532 has 18 divisors (see below), whose sum is σ = 4152031041158. Its totient is φ = 547520576832.

The previous prime is 1642561730527. The next prime is 1642561730549. The reversal of 1642561730532 is 2350371652461.

1642561730532 is a `hidden beast` number, since 1 + 6 + 4 + 2 + 561 + 7 + 30 + 53 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1641406818276 + 1154912256 = 1281174^2 + 33984^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22813357333 + ... + 22813357404.

Almost surely, 2^{1642561730532} is an apocalyptic number.

1642561730532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1642561730532 is an abundant number, since it is smaller than the sum of its proper divisors (2509469310626).

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

1642561730532 is a wasteful number, since it uses less digits than its factorization.

1642561730532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45626714747 (or 45626714742 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 1642561730532 in words is "one trillion, six hundred forty-two billion, five hundred sixty-one million, seven hundred thirty thousand, five hundred thirty-two".