61400818782 has 24 divisors (see below), whose sum is σ = 133181174880. Its totient is φ = 20444467680.

The previous prime is 61400818781. The next prime is 61400818813. The reversal of 61400818782 is 28781800416.

61400818782 is a `hidden beast` number, since 61 + 400 + 8 + 187 + 8 + 2 = 666.

61400818782 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 (61400818781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1855807 + ... + 1888602.

It is an arithmetic number, because the mean of its divisors is an integer number (5549215620).

Almost surely, 2^61400818782 is an apocalyptic number.

61400818782 is an abundant number, since it is smaller than the sum of its proper divisors (71780356098).

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

61400818782 is a wasteful number, since it uses less digits than its factorization.

61400818782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3745328 (or 3745325 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 45.

The spelling of 61400818782 in words is "sixty-one billion, four hundred million, eight hundred eighteen thousand, seven hundred eighty-two".