139865769877 has 4 divisors (see below), whose sum is σ = 139866975136. Its totient is φ = 139864564620.

The previous prime is 139865769851. The next prime is 139865769931. The reversal of 139865769877 is 778967568931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 139865769877 - 2¹¹ = 139865767829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139865769847) 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, 407499 + ... + 667672.

It is an arithmetic number, because the mean of its divisors is an integer number (34966743784).

Almost surely, 2^139865769877 is an apocalyptic number.

It is an amenable number.

139865769877 is a deficient number, since it is larger than the sum of its proper divisors (1205259).

139865769877 is a wasteful number, since it uses less digits than its factorization.

139865769877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1205258.

The product of its digits is 960180480, while the sum is 76.

The spelling of 139865769877 in words is "one hundred thirty-nine billion, eight hundred sixty-five million, seven hundred sixty-nine thousand, eight hundred seventy-seven".