2617772321 has 4 divisors (see below), whose sum is σ = 2619538992. Its totient is φ = 2616005652.

The previous prime is 2617772317. The next prime is 2617772323. The reversal of 2617772321 is 1232777162.

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: 1232777162 = 2 ⋅616388581.

It is a cyclic number.

It is not a de Polignac number, because 2617772321 - 2² = 2617772317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2617772323) 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, 881111 + ... + 884076.

It is an arithmetic number, because the mean of its divisors is an integer number (654884748).

Almost surely, 2^2617772321 is an apocalyptic number.

It is an amenable number.

2617772321 is a deficient number, since it is larger than the sum of its proper divisors (1766671).

2617772321 is a wasteful number, since it uses less digits than its factorization.

2617772321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766670.

The product of its digits is 49392, while the sum is 38.

The square root of 2617772321 is about 51164.1702854644. The cubic root of 2617772321 is about 1378.1948534040.

The spelling of 2617772321 in words is "two billion, six hundred seventeen million, seven hundred seventy-two thousand, three hundred twenty-one".