1225039516956 has 72 divisors (see below), whose sum is σ = 3277905911280. Its totient is φ = 385096610304.

The previous prime is 1225039516949. The next prime is 1225039516957. The reversal of 1225039516956 is 6596159305221.

1225039516956 is a `hidden beast` number, since 1 + 2 + 2 + 5 + 0 + 39 + 516 + 95 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225039516957) 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 23 ways as a sum of consecutive naturals, for example, 13599405 + ... + 13689188.

It is an arithmetic number, because the mean of its divisors is an integer number (45526470990).

Almost surely, 2^{1225039516956} is an apocalyptic number.

It is an amenable number.

1225039516956 is an abundant number, since it is smaller than the sum of its proper divisors (2052866394324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225039516956 is a wasteful number, since it uses less digits than its factorization.

1225039516956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27288675 (or 27288670 counting only the distinct ones).

The product of its (nonzero) digits is 4374000, while the sum is 54.

The spelling of 1225039516956 in words is "one trillion, two hundred twenty-five billion, thirty-nine million, five hundred sixteen thousand, nine hundred fifty-six".