138974977615 has 8 divisors (see below), whose sum is σ = 167987273040. Its totient is φ = 110368448832.

The previous prime is 138974977573. The next prime is 138974977619. The reversal of 138974977615 is 516779479831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138974977615 - 2²¹ = 138972880463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138974977619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101440905 + ... + 101442274.

It is an arithmetic number, because the mean of its divisors is an integer number (20998409130).

Almost surely, 2^138974977615 is an apocalyptic number.

138974977615 is a deficient number, since it is larger than the sum of its proper divisors (29012295425).

138974977615 is a wasteful number, since it uses less digits than its factorization.

138974977615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202883321.

The product of its digits is 80015040, while the sum is 67.

The spelling of 138974977615 in words is "one hundred thirty-eight billion, nine hundred seventy-four million, nine hundred seventy-seven thousand, six hundred fifteen".