51805742901 has 32 divisors (see below), whose sum is σ = 76752023040. Its totient is φ = 30816513600.

The previous prime is 51805742867. The next prime is 51805742927. The reversal of 51805742901 is 10924750815.

It is not a de Polignac number, because 51805742901 - 2¹⁴ = 51805726517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51805742981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1231231 + ... + 1272611.

It is an arithmetic number, because the mean of its divisors is an integer number (2398500720).

Almost surely, 2^51805742901 is an apocalyptic number.

It is an amenable number.

51805742901 is a deficient number, since it is larger than the sum of its proper divisors (24946280139).

51805742901 is a wasteful number, since it uses less digits than its factorization.

51805742901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42097.

The product of its (nonzero) digits is 100800, while the sum is 42.

The spelling of 51805742901 in words is "fifty-one billion, eight hundred five million, seven hundred forty-two thousand, nine hundred one".