138147989544490 has 8 divisors (see below), whose sum is σ = 248666381180100. Its totient is φ = 55259195817792.

The previous prime is 138147989544457. The next prime is 138147989544491. The reversal of 138147989544490 is 94445989741831.

It can be written as a sum of positive squares in 2 ways, for example, as 125991128828929 + 12156860715561 = 11224577^2 + 3486669^2 .

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

It is not an unprimeable number, because it can be changed into a prime (138147989544491) 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, 6907399477215 + ... + 6907399477234.

Almost surely, 2^{138147989544490} is an apocalyptic number.

138147989544490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138147989544490 is a deficient number, since it is larger than the sum of its proper divisors (110518391635610).

138147989544490 is a wasteful number, since it uses less digits than its factorization.

138147989544490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13814798954456.

The product of its (nonzero) digits is 1254113280, while the sum is 76.

The spelling of 138147989544490 in words is "one hundred thirty-eight trillion, one hundred forty-seven billion, nine hundred eighty-nine million, five hundred forty-four thousand, four hundred ninety".