51642655640443 has 8 divisors (see below), whose sum is σ = 59022888753888. Its totient is φ = 44263100246784.

The previous prime is 51642655640309. The next prime is 51642655640453. The reversal of 51642655640443 is 34404655624615.

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

It is a cyclic number.

It is not a de Polignac number, because 51642655640443 - 2¹⁷ = 51642655509371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51642655640453) 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, 169266646 + ... + 169571467.

It is an arithmetic number, because the mean of its divisors is an integer number (7377861094236).

Almost surely, 2^{51642655640443} is an apocalyptic number.

51642655640443 is a deficient number, since it is larger than the sum of its proper divisors (7380233113445).

51642655640443 is a wasteful number, since it uses less digits than its factorization.

51642655640443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338859893.

The product of its (nonzero) digits is 41472000, while the sum is 55.

The spelling of 51642655640443 in words is "fifty-one trillion, six hundred forty-two billion, six hundred fifty-five million, six hundred forty thousand, four hundred forty-three".