137378065523 has 2 divisors, whose sum is σ = 137378065524. Its totient is φ = 137378065522.

The previous prime is 137378065471. The next prime is 137378065537. The reversal of 137378065523 is 325560873731.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 137378065523 - 2⁸ = 137378065267 is a prime.

It is not a weakly prime, because it can be changed into another prime (137378065723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68689032761 + 68689032762.

It is an arithmetic number, because the mean of its divisors is an integer number (68689032762).

Almost surely, 2^137378065523 is an apocalyptic number.

137378065523 is a deficient number, since it is larger than the sum of its proper divisors (1).

137378065523 is an equidigital number, since it uses as much as digits as its factorization.

137378065523 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3175200, while the sum is 50.

The spelling of 137378065523 in words is "one hundred thirty-seven billion, three hundred seventy-eight million, sixty-five thousand, five hundred twenty-three".