51438642321406 has 8 divisors (see below), whose sum is σ = 79646930046144. Its totient is φ = 24889665639360.

The previous prime is 51438642321383. The next prime is 51438642321413. The reversal of 51438642321406 is 60412324683415.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51438642321406.

It is a congruent 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, 414827760595 + ... + 414827760718.

It is an arithmetic number, because the mean of its divisors is an integer number (9955866255768).

Almost surely, 2^{51438642321406} is an apocalyptic number.

51438642321406 is a deficient number, since it is larger than the sum of its proper divisors (28208287724738).

51438642321406 is a wasteful number, since it uses less digits than its factorization.

51438642321406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829655521346.

The product of its (nonzero) digits is 3317760, while the sum is 49.

The spelling of 51438642321406 in words is "fifty-one trillion, four hundred thirty-eight billion, six hundred forty-two million, three hundred twenty-one thousand, four hundred six".