1656153977 has 2 divisors, whose sum is σ = 1656153978. Its totient is φ = 1656153976.

The previous prime is 1656153971. The next prime is 1656153979. The reversal of 1656153977 is 7793516561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1581175696 + 74978281 = 39764^2 + 8659^2 .

It is an emirp because it is prime and its reverse (7793516561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1656153977 - 2⁶ = 1656153913 is a prime.

Together with 1656153979, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1656153971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 828076988 + 828076989.

It is an arithmetic number, because the mean of its divisors is an integer number (828076989).

Almost surely, 2^1656153977 is an apocalyptic number.

It is an amenable number.

1656153977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1656153977 is an equidigital number, since it uses as much as digits as its factorization.

1656153977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1190700, while the sum is 50.

The square root of 1656153977 is about 40695.8717439497. The cubic root of 1656153977 is about 1183.1330074078.

The spelling of 1656153977 in words is "one billion, six hundred fifty-six million, one hundred fifty-three thousand, nine hundred seventy-seven".