138487505357 has 4 divisors (see below), whose sum is σ = 139781781216. Its totient is φ = 137193229500.

The previous prime is 138487505341. The next prime is 138487505393. The reversal of 138487505357 is 753505784831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 138487505357 - 2⁴ = 138487505341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138487505557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 647137769 + ... + 647137982.

It is an arithmetic number, because the mean of its divisors is an integer number (34945445304).

Almost surely, 2^138487505357 is an apocalyptic number.

It is an amenable number.

138487505357 is a deficient number, since it is larger than the sum of its proper divisors (1294275859).

138487505357 is a wasteful number, since it uses less digits than its factorization.

138487505357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294275858.

The product of its (nonzero) digits is 14112000, while the sum is 56.

The spelling of 138487505357 in words is "one hundred thirty-eight billion, four hundred eighty-seven million, five hundred five thousand, three hundred fifty-seven".