61212016 has 40 divisors (see below), whose sum is σ = 126804384. Its totient is φ = 28554240.

The previous prime is 61212007. The next prime is 61212017. The reversal of 61212016 is 61021216.

It is a junction number, because it is equal to n+sod(n) for n = 61211984 and 61212002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61212017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13060 + ... + 17116.

Almost surely, 2^61212016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61212016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63402192).

61212016 is an abundant number, since it is smaller than the sum of its proper divisors (65592368).

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

61212016 is a wasteful number, since it uses less digits than its factorization.

61212016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4129 (or 4123 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 61212016 is about 7823.8108361591. The cubic root of 61212016 is about 394.1052567349.

The spelling of 61212016 in words is "sixty-one million, two hundred twelve thousand, sixteen".