137575637506 has 4 divisors (see below), whose sum is σ = 206363456262. Its totient is φ = 68787818752.

The previous prime is 137575637491. The next prime is 137575637531. The reversal of 137575637506 is 605736575731.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 69224241025 + 68351396481 = 263105^2 + 261441^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34393909375 + ... + 34393909378.

Almost surely, 2^137575637506 is an apocalyptic number.

137575637506 is a deficient number, since it is larger than the sum of its proper divisors (68787818756).

137575637506 is an equidigital number, since it uses as much as digits as its factorization.

137575637506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68787818755.

The product of its (nonzero) digits is 13891500, while the sum is 55.

The spelling of 137575637506 in words is "one hundred thirty-seven billion, five hundred seventy-five million, six hundred thirty-seven thousand, five hundred six".