8153579981 has 8 divisors (see below), whose sum is σ = 8191451904. Its totient is φ = 8115765840.

The previous prime is 8153579963. The next prime is 8153580023. The reversal of 8153579981 is 1899753518.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8153579981 is a prime.

It is a super-2 number, since 2×8153579981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8153579911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282440 + ... + 309966.

It is an arithmetic number, because the mean of its divisors is an integer number (1023931488).

Almost surely, 2^8153579981 is an apocalyptic number.

It is an amenable number.

8153579981 is a deficient number, since it is larger than the sum of its proper divisors (37871923).

8153579981 is a wasteful number, since it uses less digits than its factorization.

8153579981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28891.

The product of its digits is 2721600, while the sum is 56.

The square root of 8153579981 is about 90297.1759303689. The cubic root of 8153579981 is about 2012.7172955500.

The spelling of 8153579981 in words is "eight billion, one hundred fifty-three million, five hundred seventy-nine thousand, nine hundred eighty-one".