320135551553 has 4 divisors (see below), whose sum is σ = 323243663808. Its totient is φ = 317027439300.

The previous prime is 320135551537. The next prime is 320135551573. The reversal of 320135551553 is 355155531023.

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 320135551553 - 2⁴ = 320135551537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320135551513) 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, 1554055973 + ... + 1554056178.

It is an arithmetic number, because the mean of its divisors is an integer number (80810915952).

Almost surely, 2^320135551553 is an apocalyptic number.

It is an amenable number.

320135551553 is a deficient number, since it is larger than the sum of its proper divisors (3108112255).

320135551553 is a wasteful number, since it uses less digits than its factorization.

320135551553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3108112254.

The product of its (nonzero) digits is 168750, while the sum is 38.

The spelling of 320135551553 in words is "three hundred twenty billion, one hundred thirty-five million, five hundred fifty-one thousand, five hundred fifty-three".