1226904029649 has 45 divisors (see below), whose sum is σ = 1916291496889. Its totient is φ = 782227373400.

The previous prime is 1226904029639. The next prime is 1226904029669. The reversal of 1226904029649 is 9469204096221.

The square root of 1226904029649 is 1107657.

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

1226904029649 is a `hidden beast` number, since 1 + 2 + 26 + 90 + 402 + 96 + 49 = 666.

It is not a de Polignac number, because 1226904029649 - 2²¹ = 1226901932497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1226904029595 and 1226904029604.

It is not an unprimeable number, because it can be changed into a prime (1226904029629) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 229282324 + ... + 229287674.

Almost surely, 2^{1226904029649} is an apocalyptic number.

1226904029649 is the 1107657-th square number.

1226904029649 is the 553829-th centered octagonal number.

It is an amenable number.

1226904029649 is a deficient number, since it is larger than the sum of its proper divisors (689387467240).

1226904029649 is an frugal number, since it uses more digits than its factorization.

1226904029649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10760 (or 5377 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 54.

The spelling of 1226904029649 in words is "one trillion, two hundred twenty-six billion, nine hundred four million, twenty-nine thousand, six hundred forty-nine".