1216035257598 has 160 divisors (see below), whose sum is σ = 3262246732800. Its totient is φ = 331210990656.

The previous prime is 1216035257587. The next prime is 1216035257599. The reversal of 1216035257598 is 8957525306121.

1216035257598 is a `hidden beast` number, since 1 + 2 + 1 + 60 + 3 + 5 + 2 + 575 + 9 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216035257599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2363961 + ... + 2832027.

It is an arithmetic number, because the mean of its divisors is an integer number (20389042080).

Almost surely, 2^{1216035257598} is an apocalyptic number.

1216035257598 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216035257598, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1631123366400).

1216035257598 is an abundant number, since it is smaller than the sum of its proper divisors (2046211475202).

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

1216035257598 is a wasteful number, since it uses less digits than its factorization.

1216035257598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468196 (or 468187 counting only the distinct ones).

The product of its (nonzero) digits is 4536000, while the sum is 54.

The spelling of 1216035257598 in words is "one trillion, two hundred sixteen billion, thirty-five million, two hundred fifty-seven thousand, five hundred ninety-eight".