1227749605465 has 16 divisors (see below), whose sum is σ = 1480068208080. Its totient is φ = 977694186240.

The previous prime is 1227749605429. The next prime is 1227749605477. The reversal of 1227749605465 is 5645069477221.

It can be written as a sum of positive squares in 8 ways, for example, as 172813141264 + 1054936464201 = 415708^2 + 1027101^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1227749605465 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 979971 + ... + 1848199.

It is an arithmetic number, because the mean of its divisors is an integer number (92504263005).

Almost surely, 2^{1227749605465} is an apocalyptic number.

It is an amenable number.

1227749605465 is a deficient number, since it is larger than the sum of its proper divisors (252318602615).

1227749605465 is a wasteful number, since it uses less digits than its factorization.

1227749605465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869532.

The product of its (nonzero) digits is 25401600, while the sum is 58.

The spelling of 1227749605465 in words is "one trillion, two hundred twenty-seven billion, seven hundred forty-nine million, six hundred five thousand, four hundred sixty-five".