161200601655 has 32 divisors (see below), whose sum is σ = 263721768960. Its totient is φ = 84061186560.

The previous prime is 161200601621. The next prime is 161200601659. The reversal of 161200601655 is 556106002161.

It is not a de Polignac number, because 161200601655 - 2⁹ = 161200601143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161200601659) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 538306 + ... + 782415.

It is an arithmetic number, because the mean of its divisors is an integer number (8241305280).

Almost surely, 2^161200601655 is an apocalyptic number.

161200601655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161200601655 is a deficient number, since it is larger than the sum of its proper divisors (102521167305).

161200601655 is a wasteful number, since it uses less digits than its factorization.

161200601655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320911.

The product of its (nonzero) digits is 10800, while the sum is 33.

The spelling of 161200601655 in words is "one hundred sixty-one billion, two hundred million, six hundred one thousand, six hundred fifty-five".