842653640429 has 4 divisors (see below), whose sum is σ = 842691710784. Its totient is φ = 842615570076.

The previous prime is 842653640399. The next prime is 842653640449. The reversal of 842653640429 is 924046356248.

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 842653640429 - 2³² = 838358673133 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 (842653640449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19001957 + ... + 19046250.

It is an arithmetic number, because the mean of its divisors is an integer number (210672927696).

Almost surely, 2^842653640429 is an apocalyptic number.

It is an amenable number.

842653640429 is a deficient number, since it is larger than the sum of its proper divisors (38070355).

842653640429 is a wasteful number, since it uses less digits than its factorization.

842653640429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38070354.

The product of its (nonzero) digits is 9953280, while the sum is 53.

The spelling of 842653640429 in words is "eight hundred forty-two billion, six hundred fifty-three million, six hundred forty thousand, four hundred twenty-nine".