1437116561 has 2 divisors, whose sum is σ = 1437116562. Its totient is φ = 1437116560.

The previous prime is 1437116557. The next prime is 1437116581. The reversal of 1437116561 is 1656117341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1290246400 + 146870161 = 35920^2 + 12119^2 .

It is a cyclic number.

It is not a de Polignac number, because 1437116561 - 2² = 1437116557 is a prime.

It is not a weakly prime, because it can be changed into another prime (1437116581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 718558280 + 718558281.

It is an arithmetic number, because the mean of its divisors is an integer number (718558281).

Almost surely, 2^1437116561 is an apocalyptic number.

It is an amenable number.

1437116561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1437116561 is an equidigital number, since it uses as much as digits as its factorization.

1437116561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 35.

The square root of 1437116561 is about 37909.3202392235. The cubic root of 1437116561 is about 1128.4890032377.

The spelling of 1437116561 in words is "one billion, four hundred thirty-seven million, one hundred sixteen thousand, five hundred sixty-one".