61027989792 has 576 divisors, whose sum is σ = 211015010304. Its totient is φ = 15124032000.

The previous prime is 61027989703. The next prime is 61027989821. The reversal of 61027989792 is 29798972016.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 859549117 + ... + 859549187.

It is an arithmetic number, because the mean of its divisors is an integer number (366345504).

Almost surely, 2^61027989792 is an apocalyptic number.

61027989792 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61027989792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105507505152).

61027989792 is an abundant number, since it is smaller than the sum of its proper divisors (149987020512).

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

61027989792 is a wasteful number, since it uses less digits than its factorization.

61027989792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 60.

The spelling of 61027989792 in words is "sixty-one billion, twenty-seven million, nine hundred eighty-nine thousand, seven hundred ninety-two".