146643032521 has 4 divisors (see below), whose sum is σ = 146644714512. Its totient is φ = 146641350532.

The previous prime is 146643032509. The next prime is 146643032531. The reversal of 146643032521 is 125230346641.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 125230346641 = 353879².

It is a cyclic number.

It is not a de Polignac number, because 146643032521 - 2²¹ = 146640935369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146643032531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 702631 + ... + 887116.

It is an arithmetic number, because the mean of its divisors is an integer number (36661178628).

Almost surely, 2^146643032521 is an apocalyptic number.

It is an amenable number.

146643032521 is a deficient number, since it is larger than the sum of its proper divisors (1681991).

146643032521 is an equidigital number, since it uses as much as digits as its factorization.

146643032521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681990.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 146643032521 in words is "one hundred forty-six billion, six hundred forty-three million, thirty-two thousand, five hundred twenty-one".