8151478857 has 24 divisors (see below), whose sum is σ = 12400558560. Its totient is φ = 5145603840.

The previous prime is 8151478849. The next prime is 8151478879. The reversal of 8151478857 is 7588741518.

8151478857 is a `hidden beast` number, since 8 + 1 + 514 + 78 + 8 + 57 = 666.

It is not a de Polignac number, because 8151478857 - 2³ = 8151478849 is a prime.

It is a super-2 number, since 2×8151478857² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8151478807) 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 23 ways as a sum of consecutive naturals, for example, 344398 + ... + 367304.

It is an arithmetic number, because the mean of its divisors is an integer number (516689940).

Almost surely, 2^8151478857 is an apocalyptic number.

It is an amenable number.

8151478857 is a deficient number, since it is larger than the sum of its proper divisors (4249079703).

8151478857 is a wasteful number, since it uses less digits than its factorization.

8151478857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25013 (or 25010 counting only the distinct ones).

The product of its digits is 2508800, while the sum is 54.

The square root of 8151478857 is about 90285.5406862029. The cubic root of 8151478857 is about 2012.5443926887.

The spelling of 8151478857 in words is "eight billion, one hundred fifty-one million, four hundred seventy-eight thousand, eight hundred fifty-seven".