7855494061 has 2 divisors, whose sum is σ = 7855494062. Its totient is φ = 7855494060.

The previous prime is 7855494047. The next prime is 7855494089. The reversal of 7855494061 is 1604945587.

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., 7727464836 + 128029225 = 87906^2 + 11315^2 .

It is a cyclic number.

It is not a de Polignac number, because 7855494061 - 2⁵ = 7855494029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7855493996 and 7855494014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7855494461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3927747030 + 3927747031.

It is an arithmetic number, because the mean of its divisors is an integer number (3927747031).

Almost surely, 2^7855494061 is an apocalyptic number.

It is an amenable number.

7855494061 is a deficient number, since it is larger than the sum of its proper divisors (1).

7855494061 is an equidigital number, since it uses as much as digits as its factorization.

7855494061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The square root of 7855494061 is about 88631.2250902581. The cubic root of 7855494061 is about 1987.8845950933.

The spelling of 7855494061 in words is "seven billion, eight hundred fifty-five million, four hundred ninety-four thousand, sixty-one".