42979327689861 has 24 divisors (see below), whose sum is σ = 64240245721080. Its totient is φ = 27656987976576.

The previous prime is 42979327689853. The next prime is 42979327689863. The reversal of 42979327689861 is 16898672397924.

42979327689861 is a `hidden beast` number, since 4 + 2 + 97 + 9 + 327 + 68 + 98 + 61 = 666.

42979327689861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 30944020680225 + 12035307009636 = 5562735^2 + 3469194^2 .

It is not a de Polignac number, because 42979327689861 - 2³ = 42979327689853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42979327689863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22492890 + ... + 24328763.

It is an arithmetic number, because the mean of its divisors is an integer number (2676676905045).

Almost surely, 2^{42979327689861} is an apocalyptic number.

It is an amenable number.

42979327689861 is a deficient number, since it is larger than the sum of its proper divisors (21260918031219).

42979327689861 is a wasteful number, since it uses less digits than its factorization.

42979327689861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46825205 (or 46825202 counting only the distinct ones).

The product of its digits is 3950456832, while the sum is 81.

The spelling of 42979327689861 in words is "forty-two trillion, nine hundred seventy-nine billion, three hundred twenty-seven million, six hundred eighty-nine thousand, eight hundred sixty-one".