161308227405 has 16 divisors (see below), whose sum is σ = 277946484480. Its totient is φ = 79413281088.

The previous prime is 161308227349. The next prime is 161308227419. The reversal of 161308227405 is 504722803161.

It is not a de Polignac number, because 161308227405 - 2⁷ = 161308227277 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 413610645 + ... + 413611034.

It is an arithmetic number, because the mean of its divisors is an integer number (17371655280).

Almost surely, 2^161308227405 is an apocalyptic number.

161308227405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161308227405 is a deficient number, since it is larger than the sum of its proper divisors (116638257075).

161308227405 is a wasteful number, since it uses less digits than its factorization.

161308227405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827221700.

The product of its (nonzero) digits is 80640, while the sum is 39.

The spelling of 161308227405 in words is "one hundred sixty-one billion, three hundred eight million, two hundred twenty-seven thousand, four hundred five".