137637512861 has 2 divisors, whose sum is σ = 137637512862. Its totient is φ = 137637512860.

The previous prime is 137637512851. The next prime is 137637512863. The reversal of 137637512861 is 168215736731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83711848900 + 53925663961 = 289330^2 + 232219^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137637512861 is a prime.

Together with 137637512863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137637512863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68818756430 + 68818756431.

It is an arithmetic number, because the mean of its divisors is an integer number (68818756431).

Almost surely, 2^137637512861 is an apocalyptic number.

It is an amenable number.

137637512861 is a deficient number, since it is larger than the sum of its proper divisors (1).

137637512861 is an equidigital number, since it uses as much as digits as its factorization.

137637512861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 50.

The spelling of 137637512861 in words is "one hundred thirty-seven billion, six hundred thirty-seven million, five hundred twelve thousand, eight hundred sixty-one".