161133556307 has 8 divisors (see below), whose sum is σ = 161757984960. Its totient is φ = 160509316480.

The previous prime is 161133556303. The next prime is 161133556321. The reversal of 161133556307 is 703655331161.

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 161133556307 - 2² = 161133556303 is a prime.

It is a super-2 number, since 2×161133556307² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161133556303) 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, 1802507 + ... + 1889787.

It is an arithmetic number, because the mean of its divisors is an integer number (20219748120).

Almost surely, 2^161133556307 is an apocalyptic number.

161133556307 is a deficient number, since it is larger than the sum of its proper divisors (624428653).

161133556307 is an equidigital number, since it uses as much as digits as its factorization.

161133556307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94413.

The product of its (nonzero) digits is 170100, while the sum is 41.

Adding to 161133556307 its reverse (703655331161), we get a palindrome (864788887468).

The spelling of 161133556307 in words is "one hundred sixty-one billion, one hundred thirty-three million, five hundred fifty-six thousand, three hundred seven".