1216957701016 has 32 divisors (see below), whose sum is σ = 2382326892000. Its totient is φ = 581699923200.

The previous prime is 1216957701013. The next prime is 1216957701041. The reversal of 1216957701016 is 6101077596121.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216957701013) 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, 1504791 + ... + 2167558.

It is an arithmetic number, because the mean of its divisors is an integer number (74447715375).

Almost surely, 2^{1216957701016} is an apocalyptic number.

It is an amenable number.

1216957701016 is a deficient number, since it is larger than the sum of its proper divisors (1165369190984).

1216957701016 is a wasteful number, since it uses less digits than its factorization.

1216957701016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3674179 (or 3674175 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 46.

The spelling of 1216957701016 in words is "one trillion, two hundred sixteen billion, nine hundred fifty-seven million, seven hundred one thousand, sixteen".