8158196551 has 2 divisors, whose sum is σ = 8158196552. Its totient is φ = 8158196550.

The previous prime is 8158196549. The next prime is 8158196587. The reversal of 8158196551 is 1556918518.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8158196551 - 2¹ = 8158196549 is a prime.

Together with 8158196549, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 8158196495 and 8158196504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8158196051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4079098275 + 4079098276.

It is an arithmetic number, because the mean of its divisors is an integer number (4079098276).

Almost surely, 2^8158196551 is an apocalyptic number.

8158196551 is a deficient number, since it is larger than the sum of its proper divisors (1).

8158196551 is an equidigital number, since it uses as much as digits as its factorization.

8158196551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432000, while the sum is 49.

The square root of 8158196551 is about 90322.7355154836. The cubic root of 8158196551 is about 2013.0970917938.

The spelling of 8158196551 in words is "eight billion, one hundred fifty-eight million, one hundred ninety-six thousand, five hundred fifty-one".