428643191767 has 8 divisors (see below), whose sum is σ = 490143177216. Its totient is φ = 367209517272.

The previous prime is 428643191761. The next prime is 428643191777. The reversal of 428643191767 is 767191346824.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 428643191767 - 2²³ = 428634803159 is a prime.

It is a super-2 number, since 2×428643191767² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428643191761) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 16563883 + ... + 16589740.

It is an arithmetic number, because the mean of its divisors is an integer number (61267897152).

Almost surely, 2^428643191767 is an apocalyptic number.

428643191767 is a deficient number, since it is larger than the sum of its proper divisors (61499985449).

428643191767 is a wasteful number, since it uses less digits than its factorization.

428643191767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33155477.

The product of its digits is 12192768, while the sum is 58.

The spelling of 428643191767 in words is "four hundred twenty-eight billion, six hundred forty-three million, one hundred ninety-one thousand, seven hundred sixty-seven".