51165100651 has 16 divisors (see below), whose sum is σ = 62109429696. Its totient is φ = 41145808896.

The previous prime is 51165100633. The next prime is 51165100687. The reversal of 51165100651 is 15600156115.

It is a cyclic number.

It is not a de Polignac number, because 51165100651 - 2⁷ = 51165100523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51165100951) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 640446 + ... + 715891.

It is an arithmetic number, because the mean of its divisors is an integer number (3881839356).

Almost surely, 2^51165100651 is an apocalyptic number.

51165100651 is a deficient number, since it is larger than the sum of its proper divisors (10944329045).

51165100651 is a wasteful number, since it uses less digits than its factorization.

51165100651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356678.

The product of its (nonzero) digits is 4500, while the sum is 31.

Adding to 51165100651 its reverse (15600156115), we get a palindrome (66765256766).

The spelling of 51165100651 in words is "fifty-one billion, one hundred sixty-five million, one hundred thousand, six hundred fifty-one".