139935656446 has 4 divisors (see below), whose sum is σ = 209903484672. Its totient is φ = 69967828222.

The previous prime is 139935656437. The next prime is 139935656477. The reversal of 139935656446 is 644656539931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 644656539931 = 197 ⋅3272368223.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34983914110 + ... + 34983914113.

It is an arithmetic number, because the mean of its divisors is an integer number (52475871168).

Almost surely, 2^139935656446 is an apocalyptic number.

139935656446 is a deficient number, since it is larger than the sum of its proper divisors (69967828226).

139935656446 is an equidigital number, since it uses as much as digits as its factorization.

139935656446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69967828225.

The product of its digits is 62985600, while the sum is 61.

The spelling of 139935656446 in words is "one hundred thirty-nine billion, nine hundred thirty-five million, six hundred fifty-six thousand, four hundred forty-six".