139538730766 has 12 divisors (see below), whose sum is σ = 214288932672. Its totient is φ = 68146820196.

The previous prime is 139538730763. The next prime is 139538730769. The reversal of 139538730766 is 667037835931.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (139538730763) and next prime (139538730769).

It is a self number, because there is not a number n which added to its sum of digits gives 139538730766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139538730763) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18863086 + ... + 18870481.

It is an arithmetic number, because the mean of its divisors is an integer number (17857411056).

Almost surely, 2^139538730766 is an apocalyptic number.

139538730766 is a deficient number, since it is larger than the sum of its proper divisors (74750201906).

139538730766 is an equidigital number, since it uses as much as digits as its factorization.

139538730766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37733655 (or 37733612 counting only the distinct ones).

The product of its (nonzero) digits is 17146080, while the sum is 58.

The spelling of 139538730766 in words is "one hundred thirty-nine billion, five hundred thirty-eight million, seven hundred thirty thousand, seven hundred sixty-six".