145664550 has 36 divisors (see below), whose sum is σ = 391353300. Its totient is φ = 38843760.

The previous prime is 145664537. The next prime is 145664591. The reversal of 145664550 is 55466541.

145664550 is a `hidden beast` number, since 1 + 4 + 5 + 6 + 645 + 5 + 0 = 666.

It is a super-2 number, since 2×145664550² = 42436322253405000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 161400 + ... + 162299.

It is an arithmetic number, because the mean of its divisors is an integer number (10870925).

Almost surely, 2^145664550 is an apocalyptic number.

145664550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

145664550 is an abundant number, since it is smaller than the sum of its proper divisors (245688750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145664550 is a wasteful number, since it uses less digits than its factorization.

145664550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323717 (or 323709 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 145664550 is about 12069.1569713879. The cubic root of 145664550 is about 526.1601554653.

The spelling of 145664550 in words is "one hundred forty-five million, six hundred sixty-four thousand, five hundred fifty".