139481774450 has 18 divisors (see below), whose sum is σ = 259441012551. Its totient is φ = 55791653440.

The previous prime is 139481774371. The next prime is 139481774473. The reversal of 139481774450 is 54477184931.

139481774450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 2114436289 + 137367338161 = 45983^2 + 370631^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=264085.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 139481774392 and 139481774401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2614442 + ... + 2667258.

Almost surely, 2^139481774450 is an apocalyptic number.

139481774450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139481774450 is a deficient number, since it is larger than the sum of its proper divisors (119959238101).

139481774450 is an frugal number, since it uses more digits than its factorization.

139481774450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105646 (or 52824 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 53.

The spelling of 139481774450 in words is "one hundred thirty-nine billion, four hundred eighty-one million, seven hundred seventy-four thousand, four hundred fifty".