165473552233561 has 24 divisors (see below), whose sum is σ = 195796970107200. Its totient is φ = 138627106113600.

The previous prime is 165473552233541. The next prime is 165473552233609. The reversal of 165473552233561 is 165332255374561.

It is not a de Polignac number, because 165473552233561 - 2⁹ = 165473552233049 is a prime.

It is a super-2 number, since 2×165473552233561² (a number of 29 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 165473552233496 and 165473552233505.

It is not an unprimeable number, because it can be changed into a prime (165473552233531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73187070 + ... + 75414151.

It is an arithmetic number, because the mean of its divisors is an integer number (8158207087800).

Almost surely, 2^{165473552233561} is an apocalyptic number.

165473552233561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

165473552233561 is a deficient number, since it is larger than the sum of its proper divisors (30323417873639).

165473552233561 is a wasteful number, since it uses less digits than its factorization.

165473552233561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148601857 (or 148601844 counting only the distinct ones).

The product of its digits is 68040000, while the sum is 58.

The spelling of 165473552233561 in words is "one hundred sixty-five trillion, four hundred seventy-three billion, five hundred fifty-two million, two hundred thirty-three thousand, five hundred sixty-one".