642592811 has 6 divisors (see below), whose sum is σ = 747505980. Its totient is φ = 550793796.

The previous prime is 642592807. The next prime is 642592861. The reversal of 642592811 is 118295246.

It is not a de Polignac number, because 642592811 - 2² = 642592807 is a prime.

It is a super-3 number, since 3×642592811³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642592861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6557021 + ... + 6557118.

It is an arithmetic number, because the mean of its divisors is an integer number (124584330).

Almost surely, 2^642592811 is an apocalyptic number.

642592811 is a deficient number, since it is larger than the sum of its proper divisors (104913169).

642592811 is a wasteful number, since it uses less digits than its factorization.

642592811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13114153 (or 13114146 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 642592811 is about 25349.4144113824. The cubic root of 642592811 is about 862.9360667168.

The spelling of 642592811 in words is "six hundred forty-two million, five hundred ninety-two thousand, eight hundred eleven".