11851043281920 has 528 divisors, whose sum is σ = 42998334812160. Its totient is φ = 3129562054656.

The previous prime is 11851043281907. The next prime is 11851043281943. The reversal of 11851043281920 is 2918234015811.

11851043281920 is a `hidden beast` number, since 1 + 1 + 8 + 51 + 0 + 432 + 81 + 92 + 0 = 666.

It is a super-3 number, since 3×11851043281920³ (a number of 40 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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 47 ways as a sum of consecutive naturals, for example, 128102241 + ... + 128194719.

Almost surely, 2^{11851043281920} is an apocalyptic number.

11851043281920 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 11851043281920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21499167406080).

11851043281920 is an abundant number, since it is smaller than the sum of its proper divisors (31147291530240).

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

11851043281920 is an equidigital number, since it uses as much as digits as its factorization.

11851043281920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92622 (or 92592 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 11851043281920 in words is "eleven trillion, eight hundred fifty-one billion, forty-three million, two hundred eighty-one thousand, nine hundred twenty".