51155445401111 has 32 divisors (see below), whose sum is σ = 53142714878400. Its totient is φ = 49208370462720.

The previous prime is 51155445401051. The next prime is 51155445401117. The reversal of 51155445401111 is 11110454455115.

It is a cyclic number.

It is not a de Polignac number, because 51155445401111 - 2¹⁴ = 51155445384727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51155445401117) 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, 1291164860 + ... + 1291204478.

It is an arithmetic number, because the mean of its divisors is an integer number (1660709839950).

Almost surely, 2^{51155445401111} is an apocalyptic number.

51155445401111 is a deficient number, since it is larger than the sum of its proper divisors (1987269477289).

51155445401111 is a wasteful number, since it uses less digits than its factorization.

51155445401111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41219.

The product of its (nonzero) digits is 40000, while the sum is 38.

Adding to 51155445401111 its reverse (11110454455115), we get a palindrome (62265899856226).

The spelling of 51155445401111 in words is "fifty-one trillion, one hundred fifty-five billion, four hundred forty-five million, four hundred one thousand, one hundred eleven".