8511379642 has 4 divisors (see below), whose sum is σ = 12767069466. Its totient is φ = 4255689820.

The previous prime is 8511379637. The next prime is 8511379651. The reversal of 8511379642 is 2469731158.

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

It can be written as a sum of positive squares in only one way, i.e., 8453147481 + 58232161 = 91941^2 + 7631^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8511379592 and 8511379601.

It is an unprimeable number.

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, 2127844909 + ... + 2127844912.

Almost surely, 2^8511379642 is an apocalyptic number.

8511379642 is a deficient number, since it is larger than the sum of its proper divisors (4255689824).

8511379642 is a wasteful number, since it uses less digits than its factorization.

8511379642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4255689823.

The product of its digits is 362880, while the sum is 46.

The square root of 8511379642 is about 92257.1387048179. The cubic root of 8511379642 is about 2041.7378854964.

The spelling of 8511379642 in words is "eight billion, five hundred eleven million, three hundred seventy-nine thousand, six hundred forty-two".