8153539421 has 4 divisors (see below), whose sum is σ = 8229740832. Its totient is φ = 8077338012.

The previous prime is 8153539403. The next prime is 8153539463. The reversal of 8153539421 is 1249353518.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8153539421 - 2⁶ = 8153539357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8153539021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38100545 + ... + 38100758.

It is an arithmetic number, because the mean of its divisors is an integer number (2057435208).

Almost surely, 2^8153539421 is an apocalyptic number.

It is an amenable number.

8153539421 is a deficient number, since it is larger than the sum of its proper divisors (76201411).

8153539421 is a wasteful number, since it uses less digits than its factorization.

8153539421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76201410.

The product of its digits is 129600, while the sum is 41.

The square root of 8153539421 is about 90296.9513383481. The cubic root of 8153539421 is about 2012.7139581224.

The spelling of 8153539421 in words is "eight billion, one hundred fifty-three million, five hundred thirty-nine thousand, four hundred twenty-one".