1219926877009 has 9 divisors (see below), whose sum is σ = 1225277170779. Its totient is φ = 1214599859040.

The previous prime is 1219926876997. The next prime is 1219926877051. The reversal of 1219926877009 is 9007786299121.

The square root of 1219926877009 is 1104503.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 917470875409 + 302456001600 = 957847^2 + 549960^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1219926877009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1219926887009) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 266182932 + ... + 266187514.

Almost surely, 2^{1219926877009} is an apocalyptic number.

1219926877009 is the 1104503-rd square number.

1219926877009 is the 552252-nd centered octagonal number.

It is an amenable number.

1219926877009 is a deficient number, since it is larger than the sum of its proper divisors (5350293770).

1219926877009 is an frugal number, since it uses more digits than its factorization.

1219926877009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9648 (or 4824 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 61.

The spelling of 1219926877009 in words is "one trillion, two hundred nineteen billion, nine hundred twenty-six million, eight hundred seventy-seven thousand, nine".