13002160778 has 4 divisors (see below), whose sum is σ = 19503241170. Its totient is φ = 6501080388.

The previous prime is 13002160757. The next prime is 13002160781. The reversal of 13002160778 is 87706120031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87706120031 = 266177 ⋅329503.

It can be written as a sum of positive squares in only one way, i.e., 6977762089 + 6024398689 = 83533^2 + 77617^2 .

It is a super-3 number, since 3×13002160778³ (a number of 31 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3250540193 + ... + 3250540196.

Almost surely, 2^13002160778 is an apocalyptic number.

13002160778 is a deficient number, since it is larger than the sum of its proper divisors (6501080392).

13002160778 is an equidigital number, since it uses as much as digits as its factorization.

13002160778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6501080391.

The product of its (nonzero) digits is 14112, while the sum is 35.

The spelling of 13002160778 in words is "thirteen billion, two million, one hundred sixty thousand, seven hundred seventy-eight".