161311782622 has 8 divisors (see below), whose sum is σ = 242755843176. Its totient is φ = 80393168232.

The previous prime is 161311782553. The next prime is 161311782661. The reversal of 161311782622 is 226287113161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131360773 + ... + 131362000.

It is an arithmetic number, because the mean of its divisors is an integer number (30344480397).

Almost surely, 2^161311782622 is an apocalyptic number.

161311782622 is a deficient number, since it is larger than the sum of its proper divisors (81444060554).

161311782622 is a wasteful number, since it uses less digits than its factorization.

161311782622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262723082.

The product of its digits is 48384, while the sum is 40.

Adding to 161311782622 its reverse (226287113161), we get a palindrome (387598895783).

The spelling of 161311782622 in words is "one hundred sixty-one billion, three hundred eleven million, seven hundred eighty-two thousand, six hundred twenty-two".