61216937216 has 72 divisors (see below), whose sum is σ = 129416841120. Its totient is φ = 28819224576.

The previous prime is 61216937209. The next prime is 61216937227. The reversal of 61216937216 is 61273961216.

It is a congruent number.

It is an unprimeable number.

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, 754226 + ... + 831438.

Almost surely, 2^61216937216 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 61216937216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64708420560).

61216937216 is an abundant number, since it is smaller than the sum of its proper divisors (68199903904).

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

61216937216 is a wasteful number, since it uses less digits than its factorization.

61216937216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77411 (or 77397 counting only the distinct ones).

The product of its digits is 163296, while the sum is 44.

The spelling of 61216937216 in words is "sixty-one billion, two hundred sixteen million, nine hundred thirty-seven thousand, two hundred sixteen".