51605665390410 has 16 divisors (see below), whose sum is σ = 123853596937056. Its totient is φ = 13761510770768.

The previous prime is 51605665390387. The next prime is 51605665390441. The reversal of 51605665390410 is 1409356650615.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 860094423144 + ... + 860094423203.

It is an arithmetic number, because the mean of its divisors is an integer number (7740849808566).

Almost surely, 2^{51605665390410} is an apocalyptic number.

51605665390410 is an abundant number, since it is smaller than the sum of its proper divisors (72247931546646).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51605665390410 is a wasteful number, since it uses less digits than its factorization.

51605665390410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1720188846357.

The product of its (nonzero) digits is 2916000, while the sum is 51.

The spelling of 51605665390410 in words is "fifty-one trillion, six hundred five billion, six hundred sixty-five million, three hundred ninety thousand, four hundred ten".