9158278061 has 2 divisors, whose sum is σ = 9158278062. Its totient is φ = 9158278060.

The previous prime is 9158278021. The next prime is 9158278067. The reversal of 9158278061 is 1608728519.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6063581161 + 3094696900 = 77869^2 + 55630^2 .

It is an emirp because it is prime and its reverse (1608728519) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9158278061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9158277997 and 9158278015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9158278067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4579139030 + 4579139031.

It is an arithmetic number, because the mean of its divisors is an integer number (4579139031).

Almost surely, 2^9158278061 is an apocalyptic number.

It is an amenable number.

9158278061 is a deficient number, since it is larger than the sum of its proper divisors (1).

9158278061 is an equidigital number, since it uses as much as digits as its factorization.

9158278061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 47.

The square root of 9158278061 is about 95698.8926842939. The cubic root of 9158278061 is about 2092.2067959126.

The spelling of 9158278061 in words is "nine billion, one hundred fifty-eight million, two hundred seventy-eight thousand, sixty-one".