8151805216 has 12 divisors (see below), whose sum is σ = 16048866582. Its totient is φ = 4075902592.

The previous prime is 8151805121. The next prime is 8151805237. The reversal of 8151805216 is 6125081518.

It can be written as a sum of positive squares in only one way, i.e., 5384624400 + 2767180816 = 73380^2 + 52604^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127371925 + ... + 127371988.

Almost surely, 2^8151805216 is an apocalyptic number.

It is an amenable number.

8151805216 is a deficient number, since it is larger than the sum of its proper divisors (7897061366).

8151805216 is a wasteful number, since it uses less digits than its factorization.

8151805216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254743923 (or 254743915 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 37.

The square root of 8151805216 is about 90287.3480394679. The cubic root of 8151805216 is about 2012.5712509321.

The spelling of 8151805216 in words is "eight billion, one hundred fifty-one million, eight hundred five thousand, two hundred sixteen".