137476981861 has 2 divisors, whose sum is σ = 137476981862. Its totient is φ = 137476981860.

The previous prime is 137476981841. The next prime is 137476981877. The reversal of 137476981861 is 168189674731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135608062500 + 1868919361 = 368250^2 + 43231^2 .

It is a cyclic number.

It is not a de Polignac number, because 137476981861 - 2⁹ = 137476981349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 137476981861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137476981841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68738490930 + 68738490931.

It is an arithmetic number, because the mean of its divisors is an integer number (68738490931).

Almost surely, 2^137476981861 is an apocalyptic number.

It is an amenable number.

137476981861 is a deficient number, since it is larger than the sum of its proper divisors (1).

137476981861 is an equidigital number, since it uses as much as digits as its factorization.

137476981861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12192768, while the sum is 61.

The spelling of 137476981861 in words is "one hundred thirty-seven billion, four hundred seventy-six million, nine hundred eighty-one thousand, eight hundred sixty-one".