1772318649 has 8 divisors (see below), whose sum is σ = 2368219392. Its totient is φ = 1178981840.

The previous prime is 1772318599. The next prime is 1772318657. The reversal of 1772318649 is 9468132771.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1772318649 - 2¹⁵ = 1772285881 is a prime.

It is a super-2 number, since 2×1772318649² = 6282226787186370402, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1772318598 and 1772318607.

It is not an unprimeable number, because it can be changed into a prime (1772318699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 639369 + ... + 642134.

It is an arithmetic number, because the mean of its divisors is an integer number (296027424).

Almost surely, 2^1772318649 is an apocalyptic number.

It is an amenable number.

1772318649 is a deficient number, since it is larger than the sum of its proper divisors (595900743).

1772318649 is a wasteful number, since it uses less digits than its factorization.

1772318649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281967.

The product of its digits is 508032, while the sum is 48.

The square root of 1772318649 is about 42098.9150572791. The cubic root of 1772318649 is about 1210.1724702359.

The spelling of 1772318649 in words is "one billion, seven hundred seventy-two million, three hundred eighteen thousand, six hundred forty-nine".