642859246153 has 4 divisors (see below), whose sum is σ = 642861044608. Its totient is φ = 642857447700.

The previous prime is 642859246129. The next prime is 642859246181. The reversal of 642859246153 is 351642958246.

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 642859246153 - 2⁵ = 642859246121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 642859246094 and 642859246103.

It is not an unprimeable number, because it can be changed into a prime (642859246853) 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 3 ways as a sum of consecutive naturals, for example, 161073 + ... + 1145278.

It is an arithmetic number, because the mean of its divisors is an integer number (160715261152).

Almost surely, 2^642859246153 is an apocalyptic number.

It is an amenable number.

642859246153 is a deficient number, since it is larger than the sum of its proper divisors (1798455).

642859246153 is a wasteful number, since it uses less digits than its factorization.

642859246153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798454.

The product of its digits is 12441600, while the sum is 55.

The spelling of 642859246153 in words is "six hundred forty-two billion, eight hundred fifty-nine million, two hundred forty-six thousand, one hundred fifty-three".