8120053861 has 8 divisors (see below), whose sum is σ = 8168398848. Its totient is φ = 8071770000.

The previous prime is 8120053831. The next prime is 8120053867. The reversal of 8120053861 is 1683500218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8120053861 - 2¹³ = 8120045669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8120053867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266511 + ... + 295411.

It is an arithmetic number, because the mean of its divisors is an integer number (1021049856).

Almost surely, 2^8120053861 is an apocalyptic number.

It is an amenable number.

8120053861 is a deficient number, since it is larger than the sum of its proper divisors (48344987).

8120053861 is a wasteful number, since it uses less digits than its factorization.

8120053861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30563.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 8120053861 is about 90111.3414670984. The cubic root of 8120053861 is about 2009.9548566217.

The spelling of 8120053861 in words is "eight billion, one hundred twenty million, fifty-three thousand, eight hundred sixty-one".