7782161018 has 32 divisors (see below), whose sum is σ = 12565463040. Its totient is φ = 3603141360.

The previous prime is 7782161017. The next prime is 7782161029. The reversal of 7782161018 is 8101612877.

It is a super-2 number, since 2×7782161018² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7782161017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1624655 + ... + 1629437.

It is an arithmetic number, because the mean of its divisors is an integer number (392670720).

Almost surely, 2^7782161018 is an apocalyptic number.

7782161018 is a deficient number, since it is larger than the sum of its proper divisors (4783302022).

7782161018 is a wasteful number, since it uses less digits than its factorization.

7782161018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5762.

The product of its (nonzero) digits is 37632, while the sum is 41.

The square root of 7782161018 is about 88216.5575048131. The cubic root of 7782161018 is about 1981.6794425171.

The spelling of 7782161018 in words is "seven billion, seven hundred eighty-two million, one hundred sixty-one thousand, eighteen".