138899731546435 has 8 divisors (see below), whose sum is σ = 166792071443760. Its totient is φ = 111044856178464.

The previous prime is 138899731546399. The next prime is 138899731546517. The reversal of 138899731546435 is 534645137998831.

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 138899731546435 - 2³⁹ = 138349975732547 is a prime.

It is a super-2 number, since 2×138899731546435² (a number of 29 digits) contains 22 as substring.

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, 9366124180 + ... + 9366139009.

It is an arithmetic number, because the mean of its divisors is an integer number (20849008930470).

Almost surely, 2^{138899731546435} is an apocalyptic number.

138899731546435 is a deficient number, since it is larger than the sum of its proper divisors (27892339897325).

138899731546435 is a wasteful number, since it uses less digits than its factorization.

138899731546435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18732264677.

The product of its digits is 2351462400, while the sum is 76.

The spelling of 138899731546435 in words is "one hundred thirty-eight trillion, eight hundred ninety-nine billion, seven hundred thirty-one million, five hundred forty-six thousand, four hundred thirty-five".