8154001881 has 12 divisors (see below), whose sum is σ = 11779478100. Its totient is φ = 5435320320.

The previous prime is 8154001783. The next prime is 8154001903. The reversal of 8154001881 is 1881004518.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 426009600 + 7727992281 = 20640^2 + 87909^2 .

It is not a de Polignac number, because 8154001881 - 2¹³ = 8153993689 is a prime.

It is a super-2 number, since 2×8154001881² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8154009881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25345 + ... + 130193.

It is an arithmetic number, because the mean of its divisors is an integer number (981623175).

Almost surely, 2^8154001881 is an apocalyptic number.

It is an amenable number.

8154001881 is a deficient number, since it is larger than the sum of its proper divisors (3625476219).

8154001881 is a wasteful number, since it uses less digits than its factorization.

8154001881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113496 (or 113493 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 36.

The square root of 8154001881 is about 90299.5120750937. The cubic root of 8154001881 is about 2012.7520103944.

It can be divided in two parts, 815400 and 1881, that added together give a triangular number (817281 = T₁₂₇₈).

The spelling of 8154001881 in words is "eight billion, one hundred fifty-four million, one thousand, eight hundred eighty-one".