642716617246 has 64 divisors (see below), whose sum is σ = 1152294958080. Its totient is φ = 265405826560.

The previous prime is 642716617241. The next prime is 642716617253.

642716617246 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 642716617193 and 642716617202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642716617241) 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 31 ways as a sum of consecutive naturals, for example, 62717295 + ... + 62727541.

It is an arithmetic number, because the mean of its divisors is an integer number (18004608720).

Almost surely, 2^642716617246 is an apocalyptic number.

642716617246 is a deficient number, since it is larger than the sum of its proper divisors (509578340834).

642716617246 is a wasteful number, since it uses less digits than its factorization.

642716617246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16089.

The product of its digits is 4064256, while the sum is 52.

The spelling of 642716617246 in words is "six hundred forty-two billion, seven hundred sixteen million, six hundred seventeen thousand, two hundred forty-six".