51861054163641 has 8 divisors (see below), whose sum is σ = 69148338806400. Its totient is φ = 34573902814992.

The previous prime is 51861054163621. The next prime is 51861054163783. The reversal of 51861054163641 is 14636145016815.

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

It is not a de Polignac number, because 51861054163641 - 2¹⁴ = 51861054147257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51861054163621) 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, 32412130 + ... + 33974523.

It is an arithmetic number, because the mean of its divisors is an integer number (8643542350800).

Almost surely, 2^{51861054163641} is an apocalyptic number.

It is an amenable number.

51861054163641 is a deficient number, since it is larger than the sum of its proper divisors (17287284642759).

51861054163641 is a wasteful number, since it uses less digits than its factorization.

51861054163641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66647055.

The product of its (nonzero) digits is 2073600, while the sum is 51.

The spelling of 51861054163641 in words is "fifty-one trillion, eight hundred sixty-one billion, fifty-four million, one hundred sixty-three thousand, six hundred forty-one".