8151922945 has 8 divisors (see below), whose sum is σ = 9791533800. Its totient is φ = 6515387520.

The previous prime is 8151922931. The next prime is 8151922969. The reversal of 8151922945 is 5492291518.

It is a happy number.

It is a Cunningham number, because it is equal to 90288²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 3069504 + 8148853441 = 1752^2 + 90271^2 .

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

It is not a de Polignac number, because 8151922945 - 2¹⁹ = 8151398657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8151922895 and 8151922904.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 763020 + ... + 773629.

It is an arithmetic number, because the mean of its divisors is an integer number (1223941725).

Almost surely, 2^8151922945 is an apocalyptic number.

It is an amenable number.

8151922945 is a deficient number, since it is larger than the sum of its proper divisors (1639610855).

8151922945 is a wasteful number, since it uses less digits than its factorization.

8151922945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537715.

The product of its digits is 259200, while the sum is 46.

The square root of 8151922945 is about 90288.0000055378. Note that the first 5 decimals coincide. The cubic root of 8151922945 is about 2012.5809394552.

The spelling of 8151922945 in words is "eight billion, one hundred fifty-one million, nine hundred twenty-two thousand, nine hundred forty-five".