137390532658 has 4 divisors (see below), whose sum is σ = 206085798990. Its totient is φ = 68695266328.

The previous prime is 137390532647. The next prime is 137390532661. The reversal of 137390532658 is 856235093731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 856235093731 = 53 ⋅16155379127.

It can be written as a sum of positive squares in only one way, i.e., 129590640169 + 7799892489 = 359987^2 + 88317^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34347633163 + ... + 34347633166.

Almost surely, 2^137390532658 is an apocalyptic number.

137390532658 is a deficient number, since it is larger than the sum of its proper divisors (68695266332).

137390532658 is an equidigital number, since it uses as much as digits as its factorization.

137390532658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68695266331.

The product of its (nonzero) digits is 4082400, while the sum is 52.

The spelling of 137390532658 in words is "one hundred thirty-seven billion, three hundred ninety million, five hundred thirty-two thousand, six hundred fifty-eight".