1234123791516 has 576 divisors, whose sum is σ = 4452168913920. Its totient is φ = 278084689920.

The previous prime is 1234123791487. The next prime is 1234123791539. The reversal of 1234123791516 is 6151973214321.

1234123791516 is a `hidden beast` number, since 1 + 2 + 3 + 4 + 12 + 37 + 91 + 516 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 33109546 + ... + 33146798.

It is an arithmetic number, because the mean of its divisors is an integer number (7729459920).

Almost surely, 2^{1234123791516} 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 1234123791516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2226084456960).

1234123791516 is an abundant number, since it is smaller than the sum of its proper divisors (3218045122404).

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

1234123791516 is a wasteful number, since it uses less digits than its factorization.

1234123791516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37354 (or 37349 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The spelling of 1234123791516 in words is "one trillion, two hundred thirty-four billion, one hundred twenty-three million, seven hundred ninety-one thousand, five hundred sixteen".