137252751611861 has 2 divisors, whose sum is σ = 137252751611862. Its totient is φ = 137252751611860.

The previous prime is 137252751611627. The next prime is 137252751611893. The reversal of 137252751611861 is 168116157252731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136208739722500 + 1044011889361 = 11670850^2 + 1021769^2 .

It is an emirp because it is prime and its reverse (168116157252731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137252751611861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 137252751611797 and 137252751611806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137252751611461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68626375805930 + 68626375805931.

It is an arithmetic number, because the mean of its divisors is an integer number (68626375805931).

Almost surely, 2^{137252751611861} is an apocalyptic number.

It is an amenable number.

137252751611861 is a deficient number, since it is larger than the sum of its proper divisors (1).

137252751611861 is an equidigital number, since it uses as much as digits as its factorization.

137252751611861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4233600, while the sum is 56.

The spelling of 137252751611861 in words is "one hundred thirty-seven trillion, two hundred fifty-two billion, seven hundred fifty-one million, six hundred eleven thousand, eight hundred sixty-one".