61243543296 has 432 divisors, whose sum is σ = 208919692800. Its totient is φ = 17072529408.

The previous prime is 61243543289. The next prime is 61243543343. The reversal of 61243543296 is 69234534216.

61243543296 is a `hidden beast` number, since 6 + 1 + 2 + 4 + 354 + 3 + 296 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13086685 + ... + 13091363.

It is an arithmetic number, because the mean of its divisors is an integer number (483610400).

Almost surely, 2^61243543296 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 61243543296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104459846400).

61243543296 is an abundant number, since it is smaller than the sum of its proper divisors (147676149504).

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

61243543296 is a wasteful number, since it uses less digits than its factorization.

61243543296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4756 (or 4739 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

The spelling of 61243543296 in words is "sixty-one billion, two hundred forty-three million, five hundred forty-three thousand, two hundred ninety-six".