139654449869786 has 4 divisors (see below), whose sum is σ = 209481674804682. Its totient is φ = 69827224934892.

The previous prime is 139654449869771. The next prime is 139654449869797. The reversal of 139654449869786 is 687968944456931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 135486829694161 + 4167620175625 = 11639881^2 + 2041475^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34913612467445 + ... + 34913612467448.

Almost surely, 2^{139654449869786} is an apocalyptic number.

139654449869786 is a deficient number, since it is larger than the sum of its proper divisors (69827224934896).

139654449869786 is an equidigital number, since it uses as much as digits as its factorization.

139654449869786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69827224934895.

The product of its digits is 67722117120, while the sum is 89.

The spelling of 139654449869786 in words is "one hundred thirty-nine trillion, six hundred fifty-four billion, four hundred forty-nine million, eight hundred sixty-nine thousand, seven hundred eighty-six".