5931978678061 has 2 divisors, whose sum is σ = 5931978678062. Its totient is φ = 5931978678060.

The previous prime is 5931978678037. The next prime is 5931978678127. The reversal of 5931978678061 is 1608768791395.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3067104229225 + 2864874448836 = 1751315^2 + 1692594^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5931978678061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5931978678961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2965989339030 + 2965989339031.

It is an arithmetic number, because the mean of its divisors is an integer number (2965989339031).

Almost surely, 2^{5931978678061} is an apocalyptic number.

It is an amenable number.

5931978678061 is a deficient number, since it is larger than the sum of its proper divisors (1).

5931978678061 is an equidigital number, since it uses as much as digits as its factorization.

5931978678061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 137168640, while the sum is 70.

The spelling of 5931978678061 in words is "five trillion, nine hundred thirty-one billion, nine hundred seventy-eight million, six hundred seventy-eight thousand, sixty-one".