51631361421643 has 8 divisors (see below), whose sum is σ = 53898717364128. Its totient is φ = 49365881657664.

The previous prime is 51631361421589. The next prime is 51631361421701. The reversal of 51631361421643 is 34612416313615.

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

It is not a de Polignac number, because 51631361421643 - 2¹³ = 51631361413451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51631361421593 and 51631361421602.

It is not an unprimeable number, because it can be changed into a prime (51631361421043) 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, 468988380 + ... + 469098457.

It is an arithmetic number, because the mean of its divisors is an integer number (6737339670516).

Almost surely, 2^{51631361421643} is an apocalyptic number.

51631361421643 is a deficient number, since it is larger than the sum of its proper divisors (2267355942485).

51631361421643 is a wasteful number, since it uses less digits than its factorization.

51631361421643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938089253.

The product of its digits is 933120, while the sum is 46.

The spelling of 51631361421643 in words is "fifty-one trillion, six hundred thirty-one billion, three hundred sixty-one million, four hundred twenty-one thousand, six hundred forty-three".