8421537861463 has 4 divisors (see below), whose sum is σ = 8421555815640. Its totient is φ = 8421519907288.

The previous prime is 8421537861461. The next prime is 8421537861571. The reversal of 8421537861463 is 3641687351248.

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 8421537861463 - 2¹ = 8421537861461 is a prime.

It is a super-3 number, since 3×8421537861463³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8421537861398 and 8421537861407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8421537861461) 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, 8254093 + ... + 9218086.

It is an arithmetic number, because the mean of its divisors is an integer number (2105388953910).

Almost surely, 2^{8421537861463} is an apocalyptic number.

8421537861463 is a deficient number, since it is larger than the sum of its proper divisors (17954177).

8421537861463 is a wasteful number, since it uses less digits than its factorization.

8421537861463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17954176.

The product of its digits is 23224320, while the sum is 58.

The spelling of 8421537861463 in words is "eight trillion, four hundred twenty-one billion, five hundred thirty-seven million, eight hundred sixty-one thousand, four hundred sixty-three".