61516543000 has 128 divisors (see below), whose sum is σ = 157185100800. Its totient is φ = 22348272000.

The previous prime is 61516542977. The next prime is 61516543001. The reversal of 61516543000 is 34561516.

61516543000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61516543001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15695041 + ... + 15698959.

It is an arithmetic number, because the mean of its divisors is an integer number (1228008600).

Almost surely, 2^61516543000 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 61516543000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78592550400).

61516543000 is an abundant number, since it is smaller than the sum of its proper divisors (95668557800).

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

61516543000 is a wasteful number, since it uses less digits than its factorization.

61516543000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5378 (or 5364 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 61516543000 in words is "sixty-one billion, five hundred sixteen million, five hundred forty-three thousand".