1220040502765 has 32 divisors (see below), whose sum is σ = 1681633820160. Its totient is φ = 832386412800.

The previous prime is 1220040502711. The next prime is 1220040502787. The reversal of 1220040502765 is 5672050400221.

It is a de Polignac number, because none of the positive numbers 2^k-1220040502765 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1220040502765.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12060295 + ... + 12161035.

It is an arithmetic number, because the mean of its divisors is an integer number (52551056880).

Almost surely, 2^{1220040502765} is an apocalyptic number.

It is an amenable number.

1220040502765 is a deficient number, since it is larger than the sum of its proper divisors (461593317395).

1220040502765 is a wasteful number, since it uses less digits than its factorization.

1220040502765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102493.

The product of its (nonzero) digits is 33600, while the sum is 34.

Adding to 1220040502765 its reverse (5672050400221), we get a palindrome (6892090902986).

The spelling of 1220040502765 in words is "one trillion, two hundred twenty billion, forty million, five hundred two thousand, seven hundred sixty-five".