161208923415 has 12 divisors (see below), whose sum is σ = 257936765544. Its totient is φ = 85977263136.

The previous prime is 161208923411. The next prime is 161208923431. The reversal of 161208923415 is 514329802161.

161208923415 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161208923415 - 2² = 161208923411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161208923411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1503201 + ... + 1606869.

It is an arithmetic number, because the mean of its divisors is an integer number (21494730462).

Almost surely, 2^161208923415 is an apocalyptic number.

161208923415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161208923415 is a deficient number, since it is larger than the sum of its proper divisors (96727842129).

161208923415 is an frugal number, since it uses more digits than its factorization.

161208923415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207346 (or 103677 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The spelling of 161208923415 in words is "one hundred sixty-one billion, two hundred eight million, nine hundred twenty-three thousand, four hundred fifteen".