146776850221 has 4 divisors (see below), whose sum is σ = 146778860700. Its totient is φ = 146774839744.

The previous prime is 146776850191. The next prime is 146776850237. The reversal of 146776850221 is 122058677641.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122058677641 = 12569 ⋅9711089.

It can be written as a sum of positive squares in 2 ways, for example, as 123896960100 + 22879890121 = 351990^2 + 151261^2 .

It is a cyclic number.

It is not a de Polignac number, because 146776850221 - 2¹⁷ = 146776719149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (146776850261) 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, 891436 + ... + 1043173.

It is an arithmetic number, because the mean of its divisors is an integer number (36694715175).

Almost surely, 2^146776850221 is an apocalyptic number.

It is an amenable number.

146776850221 is a deficient number, since it is larger than the sum of its proper divisors (2010479).

146776850221 is an equidigital number, since it uses as much as digits as its factorization.

146776850221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2010478.

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 146776850221 in words is "one hundred forty-six billion, seven hundred seventy-six million, eight hundred fifty thousand, two hundred twenty-one".