6642436031 has 24 divisors (see below), whose sum is σ = 8473170384. Its totient is φ = 5149025280.

The previous prime is 6642436007. The next prime is 6642436039. The reversal of 6642436031 is 1306342466.

It is a de Polignac number, because none of the positive numbers 2^k-6642436031 is a prime.

It is a super-2 number, since 2×6642436031² = 88243912851854065922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6642435982 and 6642436000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642436039) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72101 + ... + 135953.

It is an arithmetic number, because the mean of its divisors is an integer number (353048766).

Almost surely, 2^6642436031 is an apocalyptic number.

6642436031 is a deficient number, since it is larger than the sum of its proper divisors (1830734353).

6642436031 is a wasteful number, since it uses less digits than its factorization.

6642436031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64071 (or 64064 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 35.

The square root of 6642436031 is about 81501.1412864875. The cubic root of 6642436031 is about 1879.7890995311.

Adding to 6642436031 its reverse (1306342466), we get a palindrome (7948778497).

The spelling of 6642436031 in words is "six billion, six hundred forty-two million, four hundred thirty-six thousand, thirty-one".