51106555061655 has 32 divisors (see below), whose sum is σ = 82009849311936. Its totient is φ = 27177157361664.

The previous prime is 51106555061591. The next prime is 51106555061657. The reversal of 51106555061655 is 55616055560115.

It is not a de Polignac number, because 51106555061655 - 2⁶ = 51106555061591 is a prime.

It is a super-2 number, since 2×51106555061655² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51106555061598 and 51106555061607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51106555061657) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3512599 + ... + 10702871.

It is an arithmetic number, because the mean of its divisors is an integer number (2562807790998).

Almost surely, 2^{51106555061655} is an apocalyptic number.

51106555061655 is a deficient number, since it is larger than the sum of its proper divisors (30903294250281).

51106555061655 is a wasteful number, since it uses less digits than its factorization.

51106555061655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7191667.

The product of its (nonzero) digits is 3375000, while the sum is 51.

The spelling of 51106555061655 in words is "fifty-one trillion, one hundred six billion, five hundred fifty-five million, sixty-one thousand, six hundred fifty-five".