646321140005131 has 8 divisors (see below), whose sum is σ = 648398691327024. Its totient is φ = 644243831975520.

The previous prime is 646321140005081. The next prime is 646321140005263. The reversal of 646321140005131 is 131500041123646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 646321140005131 - 2⁷ = 646321140005003 is a prime.

It is a super-2 number, since 2×646321140005131² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646321140003131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55500660 + ... + 66128401.

It is an arithmetic number, because the mean of its divisors is an integer number (81049836415878).

Almost surely, 2^{646321140005131} is an apocalyptic number.

646321140005131 is a deficient number, since it is larger than the sum of its proper divisors (2077551321893).

646321140005131 is a wasteful number, since it uses less digits than its factorization.

646321140005131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121646141.

The product of its (nonzero) digits is 51840, while the sum is 37.

Adding to 646321140005131 its reverse (131500041123646), we get a palindrome (777821181128777).

The spelling of 646321140005131 in words is "six hundred forty-six trillion, three hundred twenty-one billion, one hundred forty million, five thousand, one hundred thirty-one".