61216911 has 16 divisors (see below), whose sum is σ = 103648000. Its totient is φ = 34980984.

The previous prime is 61216877. The next prime is 61216913. The reversal of 61216911 is 11961216.

61216911 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-61216911 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61216913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 161761 + ... + 162138.

It is an arithmetic number, because the mean of its divisors is an integer number (6478000).

Almost surely, 2^61216911 is an apocalyptic number.

61216911 is a deficient number, since it is larger than the sum of its proper divisors (42431089).

61216911 is a wasteful number, since it uses less digits than its factorization.

61216911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323915 (or 323909 counting only the distinct ones).

The product of its digits is 648, while the sum is 27.

The square root of 61216911 is about 7824.1236569983. The cubic root of 61216911 is about 394.1157617192.

The spelling of 61216911 in words is "sixty-one million, two hundred sixteen thousand, nine hundred eleven".