161323010455 has 16 divisors (see below), whose sum is σ = 195869741760. Its totient is φ = 127538574592.

The previous prime is 161323010437. The next prime is 161323010461. The reversal of 161323010455 is 554010323161.

It is a cyclic number.

It is not a de Polignac number, because 161323010455 - 2⁵ = 161323010423 is a prime.

It is a super-2 number, since 2×161323010455² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 723777 + ... + 920053.

It is an arithmetic number, because the mean of its divisors is an integer number (12241858860).

Almost surely, 2^161323010455 is an apocalyptic number.

161323010455 is a deficient number, since it is larger than the sum of its proper divisors (34546731305).

161323010455 is a wasteful number, since it uses less digits than its factorization.

161323010455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198218.

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 161323010455 in words is "one hundred sixty-one billion, three hundred twenty-three million, ten thousand, four hundred fifty-five".