139004717378 has 18 divisors (see below), whose sum is σ = 213503668947. Its totient is φ = 67874952180.

The previous prime is 139004717353. The next prime is 139004717387. The reversal of 139004717378 is 873717400931.

It can be written as a sum of positive squares in only one way, i.e., 69502358689 + 69502358689 = 263633^2 + 263633^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=263633.

It is a super-2 number, since 2×139004717378² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 22669373 + ... + 22675503.

Almost surely, 2^139004717378 is an apocalyptic number.

139004717378 is a deficient number, since it is larger than the sum of its proper divisors (74498951569).

139004717378 is an frugal number, since it uses more digits than its factorization.

139004717378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12350 (or 6176 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 50.

Multiplying 139004717378 by its sum of digits (50), we get a square (6950235868900 = 2636330²).

The spelling of 139004717378 in words is "one hundred thirty-nine billion, four million, seven hundred seventeen thousand, three hundred seventy-eight".