1225716908641 has 9 divisors (see below), whose sum is σ = 1254933602001. Its totient is φ = 1197165365172.

The previous prime is 1225716908623. The next prime is 1225716908651. The reversal of 1225716908641 is 1468096175221.

The square root of 1225716908641 is 1107121.

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

It is not a de Polignac number, because 1225716908641 - 2¹⁷ = 1225716777569 is a prime.

It is a super-3 number, since 3×1225716908641³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225716908651) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 47593330 + ... + 47619076.

It is an arithmetic number, because the mean of its divisors is an integer number (139437066889).

Almost surely, 2^{1225716908641} is an apocalyptic number.

1225716908641 is the 1107121-st square number.

1225716908641 is the 553561-st centered octagonal number.

It is an amenable number.

1225716908641 is a deficient number, since it is larger than the sum of its proper divisors (29216693360).

1225716908641 is an frugal number, since it uses more digits than its factorization.

1225716908641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51580 (or 25790 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 52.

The spelling of 1225716908641 in words is "one trillion, two hundred twenty-five billion, seven hundred sixteen million, nine hundred eight thousand, six hundred forty-one".