1291650503203 has 2 divisors, whose sum is σ = 1291650503204. Its totient is φ = 1291650503202.

The previous prime is 1291650503179. The next prime is 1291650503237. The reversal of 1291650503203 is 3023050561921.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1291650503203 is a prime.

It is a super-2 number, since 2×1291650503203² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1291650503503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645825251601 + 645825251602.

It is an arithmetic number, because the mean of its divisors is an integer number (645825251602).

Almost surely, 2^{1291650503203} is an apocalyptic number.

1291650503203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1291650503203 is an equidigital number, since it uses as much as digits as its factorization.

1291650503203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 37.

The spelling of 1291650503203 in words is "one trillion, two hundred ninety-one billion, six hundred fifty million, five hundred three thousand, two hundred three".