642653808356246 has 16 divisors (see below), whose sum is σ = 973361752306944. Its totient is φ = 318200031970344.

The previous prime is 642653808356237. The next prime is 642653808356257.

642653808356246 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×642653808356246² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26122076 + ... + 44358431.

It is an arithmetic number, because the mean of its divisors is an integer number (60835109519184).

Almost surely, 2^{642653808356246} is an apocalyptic number.

642653808356246 is a deficient number, since it is larger than the sum of its proper divisors (330707943950698).

642653808356246 is a wasteful number, since it uses less digits than its factorization.

642653808356246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70524875.

The product of its (nonzero) digits is 1194393600, while the sum is 68.

The spelling of 642653808356246 in words is "six hundred forty-two trillion, six hundred fifty-three billion, eight hundred eight million, three hundred fifty-six thousand, two hundred forty-six".