145323661 has 12 divisors (see below), whose sum is σ = 169279968. Its totient is φ = 124393752.

The previous prime is 145323653. The next prime is 145323677. The reversal of 145323661 is 166323541.

145323661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 145323661 - 2³ = 145323653 is a prime.

It is a super-2 number, since 2×145323661² = 42237932892885842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145323641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45850 + ... + 48916.

It is an arithmetic number, because the mean of its divisors is an integer number (14106664).

Almost surely, 2^145323661 is an apocalyptic number.

It is an amenable number.

145323661 is a deficient number, since it is larger than the sum of its proper divisors (23956307).

145323661 is an equidigital number, since it uses as much as digits as its factorization.

145323661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4048 (or 4041 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 145323661 is about 12055.0263790669. The cubic root of 145323661 is about 525.7493890665.

The spelling of 145323661 in words is "one hundred forty-five million, three hundred twenty-three thousand, six hundred sixty-one".