1655156641 has 2 divisors, whose sum is σ = 1655156642. Its totient is φ = 1655156640.

The previous prime is 1655156639. The next prime is 1655156647. The reversal of 1655156641 is 1466515561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1374259041 + 280897600 = 37071^2 + 16760^2 .

It is a cyclic number.

It is not a de Polignac number, because 1655156641 - 2¹ = 1655156639 is a prime.

Together with 1655156639, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1655156594 and 1655156603.

It is not a weakly prime, because it can be changed into another prime (1655156647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827578320 + 827578321.

It is an arithmetic number, because the mean of its divisors is an integer number (827578321).

Almost surely, 2^1655156641 is an apocalyptic number.

It is an amenable number.

1655156641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1655156641 is an equidigital number, since it uses as much as digits as its factorization.

1655156641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108000, while the sum is 40.

The square root of 1655156641 is about 40683.6163707210. The cubic root of 1655156641 is about 1182.8954654686.

The spelling of 1655156641 in words is "one billion, six hundred fifty-five million, one hundred fifty-six thousand, six hundred forty-one".