61068131784 has 72 divisors (see below), whose sum is σ = 181795480230. Its totient is φ = 18505491840.

The previous prime is 61068131767. The next prime is 61068131797. The reversal of 61068131784 is 48713186016.

61068131784 is a `hidden beast` number, since 610 + 6 + 8 + 13 + 17 + 8 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 60118136100 + 949995684 = 245190^2 + 30822^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3496117 + ... + 3513540.

Almost surely, 2^61068131784 is an apocalyptic number.

It is an amenable number.

61068131784 is an abundant number, since it is smaller than the sum of its proper divisors (120727348446).

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

61068131784 is a wasteful number, since it uses less digits than its factorization.

61068131784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7009691 (or 7009673 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 61068131784 in words is "sixty-one billion, sixty-eight million, one hundred thirty-one thousand, seven hundred eighty-four".