464642816658521 has 4 divisors (see below), whose sum is σ = 466156311175632. Its totient is φ = 463129322141412.

The previous prime is 464642816658473. The next prime is 464642816658583. The reversal of 464642816658521 is 125856618246464.

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 464642816658521 - 2²² = 464642812464217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (464642816658221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756747258095 + ... + 756747258708.

It is an arithmetic number, because the mean of its divisors is an integer number (116539077793908).

Almost surely, 2^{464642816658521} is an apocalyptic number.

It is an amenable number.

464642816658521 is a deficient number, since it is larger than the sum of its proper divisors (1513494517111).

464642816658521 is a wasteful number, since it uses less digits than its factorization.

464642816658521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513494517110.

The product of its digits is 530841600, while the sum is 68.

The spelling of 464642816658521 in words is "four hundred sixty-four trillion, six hundred forty-two billion, eight hundred sixteen million, six hundred fifty-eight thousand, five hundred twenty-one".