51611600005500 has 96 divisors (see below), whose sum is σ = 150307028988480. Its totient is φ = 13761806726400.

The previous prime is 51611600005499. The next prime is 51611600005501. The reversal of 51611600005500 is 550000611615.

It is an interprime number because it is at equal distance from previous prime (51611600005499) and next prime (51611600005501).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51611600005501) 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, 14496606 + ... + 17702394.

It is an arithmetic number, because the mean of its divisors is an integer number (1565698218630).

Almost surely, 2^{51611600005500} is an apocalyptic number.

51611600005500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51611600005500 is an abundant number, since it is smaller than the sum of its proper divisors (98695428982980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51611600005500 is a wasteful number, since it uses less digits than its factorization.

51611600005500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216544 (or 3216532 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 30.

The spelling of 51611600005500 in words is "fifty-one trillion, six hundred eleven billion, six hundred million, five thousand, five hundred".