51103606612545 has 16 divisors (see below), whose sum is σ = 90850856200320. Its totient is φ = 27255256859952.

The previous prime is 51103606612529. The next prime is 51103606612547. The reversal of 51103606612545 is 54521660630115.

51103606612545 is a `hidden beast` number, since 5 + 1 + 1 + 0 + 36 + 0 + 66 + 12 + 545 = 666.

It is not a de Polignac number, because 51103606612545 - 2⁴ = 51103606612529 is a prime.

It is a super-2 number, since 2×51103606612545² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 51103606612545.

It is not an unprimeable number, because it can be changed into a prime (51103606612547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189272616949 + ... + 189272617218.

It is an arithmetic number, because the mean of its divisors is an integer number (5678178512520).

Almost surely, 2^{51103606612545} is an apocalyptic number.

It is an amenable number.

51103606612545 is a deficient number, since it is larger than the sum of its proper divisors (39747249587775).

51103606612545 is a wasteful number, since it uses less digits than its factorization.

51103606612545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378545234181 (or 378545234175 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The spelling of 51103606612545 in words is "fifty-one trillion, one hundred three billion, six hundred six million, six hundred twelve thousand, five hundred forty-five".