61211349472 has 192 divisors, whose sum is σ = 157428956160. Its totient is φ = 22735282176.

The previous prime is 61211349467. The next prime is 61211349503. The reversal of 61211349472 is 27494311216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24107179 + ... + 24109717.

It is an arithmetic number, because the mean of its divisors is an integer number (819942480).

Almost surely, 2^61211349472 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 61211349472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78714478080).

61211349472 is an abundant number, since it is smaller than the sum of its proper divisors (96217606688).

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

61211349472 is a wasteful number, since it uses less digits than its factorization.

61211349472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3073 (or 3065 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The spelling of 61211349472 in words is "sixty-one billion, two hundred eleven million, three hundred forty-nine thousand, four hundred seventy-two".