1237490605649 has 2 divisors, whose sum is σ = 1237490605650. Its totient is φ = 1237490605648.

The previous prime is 1237490605609. The next prime is 1237490605651. The reversal of 1237490605649 is 9465060947321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1119484615249 + 118005990400 = 1058057^2 + 343520^2 .

It is a cyclic number.

It is not a de Polignac number, because 1237490605649 - 2³⁶ = 1168771128913 is a prime.

It is a super-2 number, since 2×1237490605649² (a number of 25 digits) contains 22 as substring.

Together with 1237490605651, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1237490605594 and 1237490605603.

It is not a weakly prime, because it can be changed into another prime (1237490605609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 618745302824 + 618745302825.

It is an arithmetic number, because the mean of its divisors is an integer number (618745302825).

Almost surely, 2^{1237490605649} is an apocalyptic number.

It is an amenable number.

1237490605649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1237490605649 is an equidigital number, since it uses as much as digits as its factorization.

1237490605649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9797760, while the sum is 56.

The spelling of 1237490605649 in words is "one trillion, two hundred thirty-seven billion, four hundred ninety million, six hundred five thousand, six hundred forty-nine".