1655051851 has 2 divisors, whose sum is σ = 1655051852. Its totient is φ = 1655051850.

The previous prime is 1655051833. The next prime is 1655051903. The reversal of 1655051851 is 1581505561.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1655051851 - 2¹⁵ = 1655019083 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1655051851.

It is not a weakly prime, because it can be changed into another prime (1655151851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827525925 + 827525926.

It is an arithmetic number, because the mean of its divisors is an integer number (827525926).

Almost surely, 2^1655051851 is an apocalyptic number.

1655051851 is a deficient number, since it is larger than the sum of its proper divisors (1).

1655051851 is an equidigital number, since it uses as much as digits as its factorization.

1655051851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30000, while the sum is 37.

The square root of 1655051851 is about 40682.3284854739. The cubic root of 1655051851 is about 1182.8705014201.

The spelling of 1655051851 in words is "one billion, six hundred fifty-five million, fifty-one thousand, eight hundred fifty-one".