1617648677 has 4 divisors (see below), whose sum is σ = 1617870240. Its totient is φ = 1617427116.

The previous prime is 1617648671. The next prime is 1617648701. The reversal of 1617648677 is 7768467161.

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.

It is a cyclic number.

It is not a de Polignac number, because 1617648677 - 2⁴ = 1617648661 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 (1617648671) 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, 99443 + ... + 114560.

It is an arithmetic number, because the mean of its divisors is an integer number (404467560).

Almost surely, 2^1617648677 is an apocalyptic number.

It is an amenable number.

1617648677 is a deficient number, since it is larger than the sum of its proper divisors (221563).

1617648677 is an equidigital number, since it uses as much as digits as its factorization.

1617648677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221562.

The product of its digits is 2370816, while the sum is 53.

The square root of 1617648677 is about 40220.0034435603. The cubic root of 1617648677 is about 1173.8918000382.

The spelling of 1617648677 in words is "one billion, six hundred seventeen million, six hundred forty-eight thousand, six hundred seventy-seven".