51155000511111 has 48 divisors (see below), whose sum is σ = 86445370302720. Its totient is φ = 28540013402880.

The previous prime is 51155000511073. The next prime is 51155000511151. The reversal of 51155000511111 is 11111500055115.

51155000511111 is a `hidden beast` number, since 51 + 1 + 550 + 0 + 0 + 51 + 1 + 1 + 11 = 666.

It is not a de Polignac number, because 51155000511111 - 2¹³ = 51155000502919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51155000511151) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2821791 + ... + 10501071.

It is an arithmetic number, because the mean of its divisors is an integer number (1800945214640).

Almost surely, 2^{51155000511111} is an apocalyptic number.

51155000511111 is a deficient number, since it is larger than the sum of its proper divisors (35290369791609).

51155000511111 is a wasteful number, since it uses less digits than its factorization.

51155000511111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7681796 (or 7681793 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 27.

Adding to 51155000511111 its reverse (11111500055115), we get a palindrome (62266500566226).

The spelling of 51155000511111 in words is "fifty-one trillion, one hundred fifty-five billion, five hundred eleven thousand, one hundred eleven".