1656957553 has 2 divisors, whose sum is σ = 1656957554. Its totient is φ = 1656957552.

The previous prime is 1656957551. The next prime is 1656957583. The reversal of 1656957553 is 3557596561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1537973089 + 118984464 = 39217^2 + 10908^2 .

It is an emirp because it is prime and its reverse (3557596561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1656957553 - 2¹ = 1656957551 is a prime.

Together with 1656957551, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1656957553.

It is not a weakly prime, because it can be changed into another prime (1656957551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 828478776 + 828478777.

It is an arithmetic number, because the mean of its divisors is an integer number (828478777).

Almost surely, 2^1656957553 is an apocalyptic number.

It is an amenable number.

1656957553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1656957553 is an equidigital number, since it uses as much as digits as its factorization.

1656957553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4252500, while the sum is 52.

The square root of 1656957553 is about 40705.7434890950. The cubic root of 1656957553 is about 1183.3243309152.

The spelling of 1656957553 in words is "one billion, six hundred fifty-six million, nine hundred fifty-seven thousand, five hundred fifty-three".