51151011165 has 40 divisors (see below), whose sum is σ = 92362315320. Its totient is φ = 27081381888.

The previous prime is 51151011151. The next prime is 51151011239. The reversal of 51151011165 is 56111015115.

It can be written as a sum of positive squares in 4 ways, for example, as 23290727769 + 27860283396 = 152613^2 + 166914^2 .

It is not a de Polignac number, because 51151011165 - 2⁵ = 51151011133 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 405460 + ... + 516429.

It is an arithmetic number, because the mean of its divisors is an integer number (2309057883).

Almost surely, 2^51151011165 is an apocalyptic number.

It is an amenable number.

51151011165 is a deficient number, since it is larger than the sum of its proper divisors (41211304155).

51151011165 is a wasteful number, since it uses less digits than its factorization.

51151011165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922043 (or 922034 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 27.

The spelling of 51151011165 in words is "fifty-one billion, one hundred fifty-one million, eleven thousand, one hundred sixty-five".