8051991508 has 12 divisors (see below), whose sum is σ = 15371983872. Its totient is φ = 3659996120.

The previous prime is 8051991487. The next prime is 8051991509.

8051991508 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×8051991508² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8051991509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91499860 + ... + 91499947.

It is an arithmetic number, because the mean of its divisors is an integer number (1280998656).

Almost surely, 2^8051991508 is an apocalyptic number.

It is an amenable number.

8051991508 is a deficient number, since it is larger than the sum of its proper divisors (7319992364).

8051991508 is a wasteful number, since it uses less digits than its factorization.

8051991508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182999822 (or 182999820 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 46.

The square root of 8051991508 is about 89732.8897784976. The cubic root of 8051991508 is about 2004.3232735857.

The spelling of 8051991508 in words is "eight billion, fifty-one million, nine hundred ninety-one thousand, five hundred eight".