27691641516 has 192 divisors, whose sum is σ = 81830891520. Its totient is φ = 7079850240.

The previous prime is 27691641469. The next prime is 27691641541. The reversal of 27691641516 is 61514619672.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17103355 + ... + 17104973.

It is an arithmetic number, because the mean of its divisors is an integer number (426202560).

Almost surely, 2^27691641516 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 27691641516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40915445760).

27691641516 is an abundant number, since it is smaller than the sum of its proper divisors (54139250004).

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

27691641516 is a wasteful number, since it uses less digits than its factorization.

27691641516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1924 (or 1922 counting only the distinct ones).

The product of its digits is 544320, while the sum is 48.

The spelling of 27691641516 in words is "twenty-seven billion, six hundred ninety-one million, six hundred forty-one thousand, five hundred sixteen".