8172555142 has 4 divisors (see below), whose sum is σ = 12258832716. Its totient is φ = 4086277570.

The previous prime is 8172555121. The next prime is 8172555143. The reversal of 8172555142 is 2415552718.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 8172555095 and 8172555104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8172555143) 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 as a sum of consecutive naturals, namely, 2043138784 + ... + 2043138787.

It is an arithmetic number, because the mean of its divisors is an integer number (3064708179).

Almost surely, 2^8172555142 is an apocalyptic number.

8172555142 is a deficient number, since it is larger than the sum of its proper divisors (4086277574).

8172555142 is a wasteful number, since it uses less digits than its factorization.

8172555142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4086277573.

The product of its digits is 112000, while the sum is 40.

The square root of 8172555142 is about 90402.1854934935. The cubic root of 8172555142 is about 2014.2774301292.

The spelling of 8172555142 in words is "eight billion, one hundred seventy-two million, five hundred fifty-five thousand, one hundred forty-two".