7138580278778 has 8 divisors (see below), whose sum is σ = 11531552758068. Its totient is φ = 3294729359424.

The previous prime is 7138580278771. The next prime is 7138580278783. The reversal of 7138580278778 is 8778720858317.

It can be written as a sum of positive squares in 2 ways, for example, as 7119574072009 + 19006206769 = 2668253^2 + 137863^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (7138580278771) 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, 137280389951 + ... + 137280390002.

Almost surely, 2^{7138580278778} is an apocalyptic number.

7138580278778 is a deficient number, since it is larger than the sum of its proper divisors (4392972479290).

7138580278778 is a wasteful number, since it uses less digits than its factorization.

7138580278778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274560779968.

The product of its (nonzero) digits is 295034880, while the sum is 71.

The spelling of 7138580278778 in words is "seven trillion, one hundred thirty-eight billion, five hundred eighty million, two hundred seventy-eight thousand, seven hundred seventy-eight".