138761478706544 has 40 divisors (see below), whose sum is σ = 276213921379968. Its totient is φ = 67481788711680.

The previous prime is 138761478706537. The next prime is 138761478706561. The reversal of 138761478706544 is 445607874167831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39630752 + ... + 42989759.

Almost surely, 2^{138761478706544} is an apocalyptic number.

It is an amenable number.

138761478706544 is a deficient number, since it is larger than the sum of its proper divisors (137452442673424).

138761478706544 is a wasteful number, since it uses less digits than its factorization.

138761478706544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82623393 (or 82623387 counting only the distinct ones).

The product of its (nonzero) digits is 758661120, while the sum is 71.

The spelling of 138761478706544 in words is "one hundred thirty-eight trillion, seven hundred sixty-one billion, four hundred seventy-eight million, seven hundred six thousand, five hundred forty-four".