11991074302620 has 768 divisors, whose sum is σ = 45360516096000. Its totient is φ = 2571183046656.

The previous prime is 11991074302573. The next prime is 11991074302631. The reversal of 11991074302620 is 2620347019911.

11991074302620 is a `hidden beast` number, since 1 + 1 + 9 + 9 + 10 + 7 + 4 + 3 + 0 + 2 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 3727407252 + ... + 3727410468.

It is an arithmetic number, because the mean of its divisors is an integer number (59063172000).

Almost surely, 2^{11991074302620} is an apocalyptic number.

11991074302620 is a gapful number since it is divisible by the number (10) 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 11991074302620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22680258048000).

11991074302620 is an abundant number, since it is smaller than the sum of its proper divisors (33369441793380).

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

11991074302620 is a wasteful number, since it uses less digits than its factorization.

11991074302620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4227 (or 4219 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The spelling of 11991074302620 in words is "eleven trillion, nine hundred ninety-one billion, seventy-four million, three hundred two thousand, six hundred twenty".