61116100111550 has 48 divisors (see below), whose sum is σ = 124015843027152. Its totient is φ = 22223011334400.

The previous prime is 61116100111523. The next prime is 61116100111559. The reversal of 61116100111550 is 5511100161116.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61116100111559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9423362 + ... + 14526938.

It is an arithmetic number, because the mean of its divisors is an integer number (2583663396399).

Almost surely, 2^{61116100111550} is an apocalyptic number.

61116100111550 is an abundant number, since it is smaller than the sum of its proper divisors (62899742915602).

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

61116100111550 is a wasteful number, since it uses less digits than its factorization.

61116100111550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5125373 (or 5125368 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 29.

Adding to 61116100111550 its reverse (5511100161116), we get a palindrome (66627200272666).

The spelling of 61116100111550 in words is "sixty-one trillion, one hundred sixteen billion, one hundred million, one hundred eleven thousand, five hundred fifty".