165623502061 has 8 divisors (see below), whose sum is σ = 169112966400. Its totient is φ = 162147537552.

The previous prime is 165623502049. The next prime is 165623502091. The reversal of 165623502061 is 160205326561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165623502061 - 2⁷ = 165623501933 is a prime.

It is a super-2 number, since 2×165623502061² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165623502061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165623502041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3350161 + ... + 3399238.

It is an arithmetic number, because the mean of its divisors is an integer number (21139120800).

Almost surely, 2^165623502061 is an apocalyptic number.

It is an amenable number.

165623502061 is a deficient number, since it is larger than the sum of its proper divisors (3489464339).

165623502061 is an equidigital number, since it uses as much as digits as its factorization.

165623502061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6749915.

The product of its (nonzero) digits is 64800, while the sum is 37.

The spelling of 165623502061 in words is "one hundred sixty-five billion, six hundred twenty-three million, five hundred two thousand, sixty-one".