138260126578 has 32 divisors (see below), whose sum is σ = 241203216384. Its totient is φ = 58216938192.

The previous prime is 138260126551. The next prime is 138260126579. The reversal of 138260126578 is 875621062831.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (138260126579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194350 + ... + 560617.

It is an arithmetic number, because the mean of its divisors is an integer number (7537600512).

Almost surely, 2^138260126578 is an apocalyptic number.

138260126578 is a deficient number, since it is larger than the sum of its proper divisors (102943089806).

138260126578 is a wasteful number, since it uses less digits than its factorization.

138260126578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755206.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 138260126578 in words is "one hundred thirty-eight billion, two hundred sixty million, one hundred twenty-six thousand, five hundred seventy-eight".