5278405578161 has 4 divisors (see below), whose sum is σ = 5390712079872. Its totient is φ = 5166099076452.

The previous prime is 5278405578001. The next prime is 5278405578163. The reversal of 5278405578161 is 1618755048725.

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 5278405578161 - 2²⁶ = 5278338469297 is a prime.

It is a super-2 number, since 2×5278405578161² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5278405578161.

It is not an unprimeable number, because it can be changed into a prime (5278405578163) 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, 56153250785 + ... + 56153250878.

It is an arithmetic number, because the mean of its divisors is an integer number (1347678019968).

Almost surely, 2^{5278405578161} is an apocalyptic number.

It is an amenable number.

5278405578161 is a deficient number, since it is larger than the sum of its proper divisors (112306501711).

5278405578161 is a wasteful number, since it uses less digits than its factorization.

5278405578161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112306501710.

The product of its (nonzero) digits is 18816000, while the sum is 59.

The spelling of 5278405578161 in words is "five trillion, two hundred seventy-eight billion, four hundred five million, five hundred seventy-eight thousand, one hundred sixty-one".