391102216512 has 1344 divisors, whose sum is σ = 1411764837120. Its totient is φ = 94680907776.

The previous prime is 391102216501. The next prime is 391102216517. The reversal of 391102216512 is 215612201193.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (1344).

It is a super-2 number, since 2×391102216512² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391102216517) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 7379287078 + ... + 7379287130.

Almost surely, 2^391102216512 is an apocalyptic number.

391102216512 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 391102216512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (705882418560).

391102216512 is an abundant number, since it is smaller than the sum of its proper divisors (1020662620608).

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

391102216512 is a wasteful number, since it uses less digits than its factorization.

391102216512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 33.

The spelling of 391102216512 in words is "three hundred ninety-one billion, one hundred two million, two hundred sixteen thousand, five hundred twelve".