1652440442561 has 4 divisors (see below), whose sum is σ = 1668801239124. Its totient is φ = 1636079646000.

The previous prime is 1652440442557. The next prime is 1652440442567.

1652440442561 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 832736551936 + 819703890625 = 912544^2 + 905375^2 .

It is a cyclic number.

It is not a de Polignac number, because 1652440442561 - 2² = 1652440442557 is a prime.

It is a super-2 number, since 2×1652440442561² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1652440442567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8180398130 + ... + 8180398331.

It is an arithmetic number, because the mean of its divisors is an integer number (417200309781).

Almost surely, 2^{1652440442561} is an apocalyptic number.

It is an amenable number.

1652440442561 is a deficient number, since it is larger than the sum of its proper divisors (16360796563).

1652440442561 is a wasteful number, since it uses less digits than its factorization.

1652440442561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16360796562.

The product of its (nonzero) digits is 921600, while the sum is 44.

The spelling of 1652440442561 in words is "one trillion, six hundred fifty-two billion, four hundred forty million, four hundred forty-two thousand, five hundred sixty-one".