145661655 has 16 divisors (see below), whose sum is σ = 234626400. Its totient is φ = 77163648.

The previous prime is 145661647. The next prime is 145661671. The reversal of 145661655 is 556166541.

It is not a de Polignac number, because 145661655 - 2³ = 145661647 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30352 + ... + 34821.

It is an arithmetic number, because the mean of its divisors is an integer number (14664150).

Almost surely, 2^145661655 is an apocalyptic number.

145661655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145661655 is a deficient number, since it is larger than the sum of its proper divisors (88964745).

145661655 is a wasteful number, since it uses less digits than its factorization.

145661655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65330.

The product of its digits is 108000, while the sum is 39.

The square root of 145661655 is about 12069.0370369802. The cubic root of 145661655 is about 526.1566697310.

The spelling of 145661655 in words is "one hundred forty-five million, six hundred sixty-one thousand, six hundred fifty-five".