428924733088991 has 4 divisors (see below), whose sum is σ = 429915321387552. Its totient is φ = 427934144790432.

The previous prime is 428924733088987. The next prime is 428924733088993. The reversal of 428924733088991 is 199880337429824.

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

It is a cyclic number.

It is not a de Polignac number, because 428924733088991 - 2² = 428924733088987 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 (428924733088993) 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, 495294148631 + ... + 495294149496.

It is an arithmetic number, because the mean of its divisors is an integer number (107478830346888).

Almost surely, 2^{428924733088991} is an apocalyptic number.

428924733088991 is a deficient number, since it is larger than the sum of its proper divisors (990588298561).

428924733088991 is an equidigital number, since it uses as much as digits as its factorization.

428924733088991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990588298560.

The product of its (nonzero) digits is 1504935936, while the sum is 77.

The spelling of 428924733088991 in words is "four hundred twenty-eight trillion, nine hundred twenty-four billion, seven hundred thirty-three million, eighty-eight thousand, nine hundred ninety-one".