161337568001 has 4 divisors (see below), whose sum is σ = 163745591472. Its totient is φ = 158929544532.

The previous prime is 161337567973. The next prime is 161337568003. The reversal of 161337568001 is 100865733161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 100865733161 = 225427 ⋅447443.

It is a cyclic number.

It is not a de Polignac number, because 161337568001 - 2²² = 161333373697 is a prime.

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 161337568001.

It is not an unprimeable number, because it can be changed into a prime (161337568003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1204011635 + ... + 1204011768.

It is an arithmetic number, because the mean of its divisors is an integer number (40936397868).

Almost surely, 2^161337568001 is an apocalyptic number.

It is an amenable number.

161337568001 is a deficient number, since it is larger than the sum of its proper divisors (2408023471).

161337568001 is an equidigital number, since it uses as much as digits as its factorization.

161337568001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408023470.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 161337568001 in words is "one hundred sixty-one billion, three hundred thirty-seven million, five hundred sixty-eight thousand, one".