1216525410256 has 40 divisors (see below), whose sum is σ = 2538393469920. Its totient is φ = 561458576256.

The previous prime is 1216525410251. The next prime is 1216525410259. The reversal of 1216525410256 is 6520145256121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216525410251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15398151 + ... + 15476953.

It is an arithmetic number, because the mean of its divisors is an integer number (63459836748).

Almost surely, 2^{1216525410256} is an apocalyptic number.

1216525410256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1216525410256 is an abundant number, since it is smaller than the sum of its proper divisors (1321868059664).

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

1216525410256 is a wasteful number, since it uses less digits than its factorization.

1216525410256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153043 (or 153037 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 40.

The spelling of 1216525410256 in words is "one trillion, two hundred sixteen billion, five hundred twenty-five million, four hundred ten thousand, two hundred fifty-six".