646132623131635 has 4 divisors (see below), whose sum is σ = 775359147757968. Its totient is φ = 516906098505304.

The previous prime is 646132623131621. The next prime is 646132623131641. The reversal of 646132623131635 is 536131326231646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 646132623131635 - 2¹⁷ = 646132623000563 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64613262313159 + ... + 64613262313168.

It is an arithmetic number, because the mean of its divisors is an integer number (193839786939492).

Almost surely, 2^{646132623131635} is an apocalyptic number.

646132623131635 is a deficient number, since it is larger than the sum of its proper divisors (129226524626333).

646132623131635 is a wasteful number, since it uses less digits than its factorization.

646132623131635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129226524626332.

The product of its digits is 8398080, while the sum is 52.

The spelling of 646132623131635 in words is "six hundred forty-six trillion, one hundred thirty-two billion, six hundred twenty-three million, one hundred thirty-one thousand, six hundred thirty-five".