61550100111 has 8 divisors (see below), whose sum is σ = 83975330560. Its totient is φ = 40079134872.

The previous prime is 61550100109. The next prime is 61550100133. The reversal of 61550100111 is 11100105516.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61550100111 - 2¹ = 61550100109 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 (61550102111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238566151 + ... + 238566408.

It is an arithmetic number, because the mean of its divisors is an integer number (10496916320).

Almost surely, 2^61550100111 is an apocalyptic number.

61550100111 is a deficient number, since it is larger than the sum of its proper divisors (22425230449).

61550100111 is a wasteful number, since it uses less digits than its factorization.

61550100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477132605.

The product of its (nonzero) digits is 150, while the sum is 21.

Adding to 61550100111 its reverse (11100105516), we get a palindrome (72650205627).

The spelling of 61550100111 in words is "sixty-one billion, five hundred fifty million, one hundred thousand, one hundred eleven".