463254400646021 has 4 divisors (see below), whose sum is σ = 479228690323500. Its totient is φ = 447280110968544.

The previous prime is 463254400645943. The next prime is 463254400646039. The reversal of 463254400646021 is 120646004452364.

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

It can be written as a sum of positive squares in 2 ways, for example, as 355970669824225 + 107283730821796 = 18867185^2 + 10357786^2 .

It is a cyclic number.

It is not a de Polignac number, because 463254400646021 - 2¹⁸ = 463254400383877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (463254400646041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7987144838696 + ... + 7987144838753.

It is an arithmetic number, because the mean of its divisors is an integer number (119807172580875).

Almost surely, 2^{463254400646021} is an apocalyptic number.

It is an amenable number.

463254400646021 is a deficient number, since it is larger than the sum of its proper divisors (15974289677479).

463254400646021 is a wasteful number, since it uses less digits than its factorization.

463254400646021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15974289677478.

The product of its (nonzero) digits is 3317760, while the sum is 47.

The spelling of 463254400646021 in words is "four hundred sixty-three trillion, two hundred fifty-four billion, four hundred million, six hundred forty-six thousand, twenty-one".