1225291078537 has 16 divisors (see below), whose sum is σ = 1279450940544. Its totient is φ = 1172508400000.

The previous prime is 1225291078511. The next prime is 1225291078597. The reversal of 1225291078537 is 7358701925221.

It is a cyclic number.

It is not a de Polignac number, because 1225291078537 - 2¹¹ = 1225291076489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225291078507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 939589 + ... + 1825762.

It is an arithmetic number, because the mean of its divisors is an integer number (79965683784).

Almost surely, 2^{1225291078537} is an apocalyptic number.

It is an amenable number.

1225291078537 is a deficient number, since it is larger than the sum of its proper divisors (54159862007).

1225291078537 is a wasteful number, since it uses less digits than its factorization.

1225291078537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2765600.

The product of its (nonzero) digits is 2116800, while the sum is 52.

The spelling of 1225291078537 in words is "one trillion, two hundred twenty-five billion, two hundred ninety-one million, seventy-eight thousand, five hundred thirty-seven".