146570497921 has 4 divisors (see below), whose sum is σ = 146590780500. Its totient is φ = 146550215344.

The previous prime is 146570497901. The next prime is 146570497939. The reversal of 146570497921 is 129794075641.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 84250867600 + 62319630321 = 290260^2 + 249639^2 .

It is a cyclic number.

It is not a de Polignac number, because 146570497921 - 2⁷ = 146570497793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (146570497901) 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, 10130446 + ... + 10144903.

It is an arithmetic number, because the mean of its divisors is an integer number (36647695125).

Almost surely, 2^146570497921 is an apocalyptic number.

It is an amenable number.

146570497921 is a deficient number, since it is larger than the sum of its proper divisors (20282579).

146570497921 is an equidigital number, since it uses as much as digits as its factorization.

146570497921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20282578.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The spelling of 146570497921 in words is "one hundred forty-six billion, five hundred seventy million, four hundred ninety-seven thousand, nine hundred twenty-one".