138784251495 has 8 divisors (see below), whose sum is σ = 222054802416. Its totient is φ = 74018267456.

The previous prime is 138784251479. The next prime is 138784251497. The reversal of 138784251495 is 594152487831.

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 138784251495 - 2⁴ = 138784251479 is a prime.

It is a super-2 number, since 2×138784251495² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138784251497) 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, 4626141702 + ... + 4626141731.

It is an arithmetic number, because the mean of its divisors is an integer number (27756850302).

Almost surely, 2^138784251495 is an apocalyptic number.

138784251495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138784251495 is a deficient number, since it is larger than the sum of its proper divisors (83270550921).

138784251495 is an equidigital number, since it uses as much as digits as its factorization.

138784251495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9252283441.

The product of its digits is 9676800, while the sum is 57.

The spelling of 138784251495 in words is "one hundred thirty-eight billion, seven hundred eighty-four million, two hundred fifty-one thousand, four hundred ninety-five".