138570075634 has 4 divisors (see below), whose sum is σ = 207855113454. Its totient is φ = 69285037816.

The previous prime is 138570075617. The next prime is 138570075643. The reversal of 138570075634 is 436570075831.

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., 133222810009 + 5347265625 = 364997^2 + 73125^2 .

It is a super-2 number, since 2×138570075634² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34642518907 + ... + 34642518910.

Almost surely, 2^138570075634 is an apocalyptic number.

138570075634 is a deficient number, since it is larger than the sum of its proper divisors (69285037820).

138570075634 is an equidigital number, since it uses as much as digits as its factorization.

138570075634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69285037819.

The product of its (nonzero) digits is 2116800, while the sum is 49.

The spelling of 138570075634 in words is "one hundred thirty-eight billion, five hundred seventy million, seventy-five thousand, six hundred thirty-four".