51116105660061 has 24 divisors (see below), whose sum is σ = 73993459516416. Its totient is φ = 31373934184320.

The previous prime is 51116105660057. The next prime is 51116105660069. The reversal of 51116105660061 is 16006650161115.

It is not a de Polignac number, because 51116105660061 - 2² = 51116105660057 is a prime.

It is a super-2 number, since 2×51116105660061² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51116105660069) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131425560 + ... + 131813921.

It is an arithmetic number, because the mean of its divisors is an integer number (3083060813184).

Almost surely, 2^{51116105660061} is an apocalyptic number.

It is an amenable number.

51116105660061 is a deficient number, since it is larger than the sum of its proper divisors (22877353856355).

51116105660061 is a wasteful number, since it uses less digits than its factorization.

51116105660061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263239893 (or 263239880 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 39.

The spelling of 51116105660061 in words is "fifty-one trillion, one hundred sixteen billion, one hundred five million, six hundred sixty thousand, sixty-one".