1646225077 has 4 divisors (see below), whose sum is σ = 1881400096. Its totient is φ = 1411050060.

The previous prime is 1646225059. The next prime is 1646225083. The reversal of 1646225077 is 7705226461.

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: 7705226461 = 353 ⋅21827837.

It is a de Polignac number, because none of the positive numbers 2^k-1646225077 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 (1646225027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117587499 + ... + 117587512.

It is an arithmetic number, because the mean of its divisors is an integer number (470350024).

Almost surely, 2^1646225077 is an apocalyptic number.

It is an amenable number.

1646225077 is a deficient number, since it is larger than the sum of its proper divisors (235175019).

1646225077 is an equidigital number, since it uses as much as digits as its factorization.

1646225077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235175018.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 1646225077 is about 40573.6993260412. The cubic root of 1646225077 is about 1180.7639114118.

The spelling of 1646225077 in words is "one billion, six hundred forty-six million, two hundred twenty-five thousand, seventy-seven".