145689555 has 16 divisors (see below), whose sum is σ = 254294784. Its totient is φ = 70637280.

The previous prime is 145689539. The next prime is 145689559. The reversal of 145689555 is 555986541.

It is not a de Polignac number, because 145689555 - 2⁴ = 145689539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145689559) 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, 441319 + ... + 441648.

It is an arithmetic number, because the mean of its divisors is an integer number (15893424).

Almost surely, 2^145689555 is an apocalyptic number.

145689555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

145689555 is a deficient number, since it is larger than the sum of its proper divisors (108605229).

145689555 is a wasteful number, since it uses less digits than its factorization.

145689555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882986.

The product of its digits is 1080000, while the sum is 48.

The square root of 145689555 is about 12070.1928319311. The cubic root of 145689555 is about 526.1902608957.

The spelling of 145689555 in words is "one hundred forty-five million, six hundred eighty-nine thousand, five hundred fifty-five".