1246154561256 has 128 divisors (see below), whose sum is σ = 3407116608000. Its totient is φ = 376677799680.

The previous prime is 1246154561251. The next prime is 1246154561257. The reversal of 1246154561256 is 6521654516421.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1246154561251) 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 31 ways as a sum of consecutive naturals, for example, 263288266 + ... + 263292998.

It is an arithmetic number, because the mean of its divisors is an integer number (26618098500).

Almost surely, 2^{1246154561256} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1246154561256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1703558304000).

1246154561256 is an abundant number, since it is smaller than the sum of its proper divisors (2160962046744).

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

1246154561256 is a wasteful number, since it uses less digits than its factorization.

1246154561256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7039 (or 7035 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 48.

The spelling of 1246154561256 in words is "one trillion, two hundred forty-six billion, one hundred fifty-four million, five hundred sixty-one thousand, two hundred fifty-six".