165720564342053 has 36 divisors (see below), whose sum is σ = 203202894357216. Its totient is φ = 132366854112000.

The previous prime is 165720564342031. The next prime is 165720564342061. The reversal of 165720564342053 is 350243465027561.

It is not a de Polignac number, because 165720564342053 - 2⁶ = 165720564341989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165720564341986 and 165720564342004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165720564302053) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16621418 + ... + 24651828.

It is an arithmetic number, because the mean of its divisors is an integer number (5644524843256).

Almost surely, 2^{165720564342053} is an apocalyptic number.

It is an amenable number.

165720564342053 is a deficient number, since it is larger than the sum of its proper divisors (37482330015163).

165720564342053 is an equidigital number, since it uses as much as digits as its factorization.

165720564342053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8030654 (or 8030536 counting only the distinct ones).

The product of its (nonzero) digits is 18144000, while the sum is 53.

The spelling of 165720564342053 in words is "one hundred sixty-five trillion, seven hundred twenty billion, five hundred sixty-four million, three hundred forty-two thousand, fifty-three".