1229532798649 has 9 divisors (see below), whose sum is σ = 1232283318127. Its totient is φ = 1226788412224.

The previous prime is 1229532798647. The next prime is 1229532798673. The reversal of 1229532798649 is 9468972359221.

The square root of 1229532798649 is 1108843.

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., 592217976249 + 637314822400 = 769557^2 + 798320^2 .

It is not a de Polignac number, because 1229532798649 - 2¹ = 1229532798647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1229532798647) 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, 650889897 + ... + 650891785.

Almost surely, 2^{1229532798649} is an apocalyptic number.

1229532798649 is the 1108843-rd square number.

1229532798649 is the 554422-nd centered octagonal number.

It is an amenable number.

1229532798649 is a deficient number, since it is larger than the sum of its proper divisors (2750519478).

1229532798649 is an frugal number, since it uses more digits than its factorization.

1229532798649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4952 (or 2476 counting only the distinct ones).

The product of its digits is 117573120, while the sum is 67.

The spelling of 1229532798649 in words is "one trillion, two hundred twenty-nine billion, five hundred thirty-two million, seven hundred ninety-eight thousand, six hundred forty-nine".