646061132053 has 4 divisors (see below), whose sum is σ = 646062858220. Its totient is φ = 646059405888.

The previous prime is 646061132023. The next prime is 646061132071. The reversal of 646061132053 is 350231160646.

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 244280097009 + 401781035044 = 494247^2 + 633862^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646061132053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646061132023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40068 + ... + 1137421.

It is an arithmetic number, because the mean of its divisors is an integer number (161515714555).

Almost surely, 2^646061132053 is an apocalyptic number.

It is an amenable number.

646061132053 is a deficient number, since it is larger than the sum of its proper divisors (1726167).

646061132053 is a wasteful number, since it uses less digits than its factorization.

646061132053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726166.

The product of its (nonzero) digits is 77760, while the sum is 37.

Adding to 646061132053 its reverse (350231160646), we get a palindrome (996292292699).

The spelling of 646061132053 in words is "six hundred forty-six billion, sixty-one million, one hundred thirty-two thousand, fifty-three".