8119752381 has 72 divisors (see below), whose sum is σ = 13747015464. Its totient is φ = 4587356160.

The previous prime is 8119752373. The next prime is 8119752499. The reversal of 8119752381 is 1832579118.

8119752381 is a `hidden beast` number, since 8 + 119 + 7 + 523 + 8 + 1 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 708092100 + 7411660281 = 26610^2 + 86091^2 .

It is not a de Polignac number, because 8119752381 - 2³ = 8119752373 is a prime.

It is a super-2 number, since 2×8119752381² (a number of 21 digits) contains 22 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (8119752331) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1383405 + ... + 1389261.

Almost surely, 2^8119752381 is an apocalyptic number.

It is an amenable number.

8119752381 is a deficient number, since it is larger than the sum of its proper divisors (5627263083).

8119752381 is a wasteful number, since it uses less digits than its factorization.

8119752381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5951 (or 5931 counting only the distinct ones).

The product of its digits is 120960, while the sum is 45.

The square root of 8119752381 is about 90109.6686321729. The cubic root of 8119752381 is about 2009.9299812247.

The spelling of 8119752381 in words is "eight billion, one hundred nineteen million, seven hundred fifty-two thousand, three hundred eighty-one".