118161505 has 16 divisors (see below), whose sum is σ = 176782464. Its totient is φ = 73658880.

The previous prime is 118161503. The next prime is 118161521. The reversal of 118161505 is 505161811.

It is not a de Polignac number, because 118161505 - 2¹ = 118161503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118161503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153072 + ... + 153841.

It is an arithmetic number, because the mean of its divisors is an integer number (11048904).

Almost surely, 2^118161505 is an apocalyptic number.

It is an amenable number.

118161505 is a deficient number, since it is larger than the sum of its proper divisors (58620959).

118161505 is a wasteful number, since it uses less digits than its factorization.

118161505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306936.

The product of its (nonzero) digits is 1200, while the sum is 28.

The square root of 118161505 is about 10870.2118194633. The cubic root of 118161505 is about 490.7104853545.

The spelling of 118161505 in words is "one hundred eighteen million, one hundred sixty-one thousand, five hundred five".