51205164650145 has 80 divisors (see below), whose sum is σ = 100193151579840. Its totient is φ = 24812215747200.

The previous prime is 51205164650131. The next prime is 51205164650153. The reversal of 51205164650145 is 54105646150215.

51205164650145 is a `hidden beast` number, since 5 + 1 + 2 + 0 + 516 + 46 + 50 + 1 + 45 = 666.

51205164650145 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51205164650145 - 2²¹ = 51205162552993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 51205164650145.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4250850 + ... + 10976340.

It is an arithmetic number, because the mean of its divisors is an integer number (1252414394748).

Almost surely, 2^{51205164650145} is an apocalyptic number.

51205164650145 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51205164650145 is a deficient number, since it is larger than the sum of its proper divisors (48987986929695).

51205164650145 is a wasteful number, since it uses less digits than its factorization.

51205164650145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6727228 (or 6727219 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 45.

The spelling of 51205164650145 in words is "fifty-one trillion, two hundred five billion, one hundred sixty-four million, six hundred fifty thousand, one hundred forty-five".