78456061 has 2 divisors, whose sum is σ = 78456062. Its totient is φ = 78456060.

The previous prime is 78456047. The next prime is 78456067. The reversal of 78456061 is 16065487.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64160100 + 14295961 = 8010^2 + 3781^2 .

It is a cyclic number.

It is not a de Polignac number, because 78456061 - 2⁵ = 78456029 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78456061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78456067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39228030 + 39228031.

It is an arithmetic number, because the mean of its divisors is an integer number (39228031).

Almost surely, 2^78456061 is an apocalyptic number.

It is an amenable number.

78456061 is a deficient number, since it is larger than the sum of its proper divisors (1).

78456061 is an equidigital number, since it uses as much as digits as its factorization.

78456061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 78456061 is about 8857.5426050344. The cubic root of 78456061 is about 428.0969824917.

The spelling of 78456061 in words is "seventy-eight million, four hundred fifty-six thousand, sixty-one".