1268822518 has 4 divisors (see below), whose sum is σ = 1903233780. Its totient is φ = 634411258.

The previous prime is 1268822507. The next prime is 1268822519. The reversal of 1268822518 is 8152288621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8152288621 = 1321 ⋅6171301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268822519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317205628 + ... + 317205631.

It is an arithmetic number, because the mean of its divisors is an integer number (475808445).

Almost surely, 2^1268822518 is an apocalyptic number.

1268822518 is a deficient number, since it is larger than the sum of its proper divisors (634411262).

1268822518 is an equidigital number, since it uses as much as digits as its factorization.

1268822518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634411261.

The product of its digits is 122880, while the sum is 43.

The square root of 1268822518 is about 35620.5350605518. The cubic root of 1268822518 is about 1082.5973487435.

The spelling of 1268822518 in words is "one billion, two hundred sixty-eight million, eight hundred twenty-two thousand, five hundred eighteen".