1291677925541 has 2 divisors, whose sum is σ = 1291677925542. Its totient is φ = 1291677925540.

The previous prime is 1291677925493. The next prime is 1291677925589. The reversal of 1291677925541 is 1455297761921.

It is a balanced prime because it is at equal distance from previous prime (1291677925493) and next prime (1291677925589).

It can be written as a sum of positive squares in only one way, i.e., 1060634276641 + 231043648900 = 1029871^2 + 480670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1291677925541 is a prime.

It is a super-2 number, since 2×1291677925541² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1291677925441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645838962770 + 645838962771.

It is an arithmetic number, because the mean of its divisors is an integer number (645838962771).

Almost surely, 2^{1291677925541} is an apocalyptic number.

It is an amenable number.

1291677925541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1291677925541 is an equidigital number, since it uses as much as digits as its factorization.

1291677925541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9525600, while the sum is 59.

The spelling of 1291677925541 in words is "one trillion, two hundred ninety-one billion, six hundred seventy-seven million, nine hundred twenty-five thousand, five hundred forty-one".