51005161611650 has 48 divisors (see below), whose sum is σ = 94912442089920. Its totient is φ = 20392853083200.

The previous prime is 51005161611643. The next prime is 51005161611659. The reversal of 51005161611650 is 5611616150015.

It is a happy number.

It is a super-2 number, since 2×51005161611650² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51005161611659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2089763747 + ... + 2089788153.

It is an arithmetic number, because the mean of its divisors is an integer number (1977342543540).

Almost surely, 2^{51005161611650} is an apocalyptic number.

51005161611650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51005161611650 is a deficient number, since it is larger than the sum of its proper divisors (43907280478270).

51005161611650 is a wasteful number, since it uses less digits than its factorization.

51005161611650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41579 (or 41574 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 38.

Adding to 51005161611650 its reverse (5611616150015), we get a palindrome (56616777761665).

The spelling of 51005161611650 in words is "fifty-one trillion, five billion, one hundred sixty-one million, six hundred eleven thousand, six hundred fifty".