161451774355 has 16 divisors (see below), whose sum is σ = 199199968128. Its totient is φ = 125546112000.

The previous prime is 161451774241. The next prime is 161451774373. The reversal of 161451774355 is 553477154161.

It is not a de Polignac number, because 161451774355 - 2¹⁹ = 161451250067 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161451774299 and 161451774308.

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, 1397526 + ... + 1508635.

It is an arithmetic number, because the mean of its divisors is an integer number (12449998008).

Almost surely, 2^161451774355 is an apocalyptic number.

161451774355 is a deficient number, since it is larger than the sum of its proper divisors (37748193773).

161451774355 is a wasteful number, since it uses less digits than its factorization.

161451774355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2906478.

The product of its digits is 1764000, while the sum is 49.

The spelling of 161451774355 in words is "one hundred sixty-one billion, four hundred fifty-one million, seven hundred seventy-four thousand, three hundred fifty-five".