51556640210210 has 8 divisors (see below), whose sum is σ = 92801952378396. Its totient is φ = 20622656084080.

The previous prime is 51556640210147. The next prime is 51556640210221. The reversal of 51556640210210 is 1201204665515.

It can be written as a sum of positive squares in 2 ways, for example, as 51556406517841 + 233692369 = 7180279^2 + 15287^2 .

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

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, 2577832010501 + ... + 2577832010520.

Almost surely, 2^{51556640210210} is an apocalyptic number.

51556640210210 is a deficient number, since it is larger than the sum of its proper divisors (41245312168186).

51556640210210 is a wasteful number, since it uses less digits than its factorization.

51556640210210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5155664021028.

The product of its (nonzero) digits is 72000, while the sum is 38.

Adding to 51556640210210 its reverse (1201204665515), we get a palindrome (52757844875725).

The spelling of 51556640210210 in words is "fifty-one trillion, five hundred fifty-six billion, six hundred forty million, two hundred ten thousand, two hundred ten".