145373661 has 6 divisors (see below), whose sum is σ = 209984190. Its totient is φ = 96915768.

The previous prime is 145373653. The next prime is 145373671. The reversal of 145373661 is 166373541.

It can be written as a sum of positive squares in only one way, i.e., 134444025 + 10929636 = 11595^2 + 3306^2 .

It is not a de Polignac number, because 145373661 - 2³ = 145373653 is a prime.

It is a super-2 number, since 2×145373661² = 42267002625085842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145373611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8076306 + ... + 8076323.

It is an arithmetic number, because the mean of its divisors is an integer number (34997365).

Almost surely, 2^145373661 is an apocalyptic number.

It is an amenable number.

145373661 is a deficient number, since it is larger than the sum of its proper divisors (64610529).

145373661 is a wasteful number, since it uses less digits than its factorization.

145373661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16152635 (or 16152632 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 145373661 is about 12057.1000244669. The cubic root of 145373661 is about 525.8096785267.

The spelling of 145373661 in words is "one hundred forty-five million, three hundred seventy-three thousand, six hundred sixty-one".