10277778505543 has 4 divisors (see below), whose sum is σ = 10278517555800. Its totient is φ = 10277039455288.

The previous prime is 10277778505541. The next prime is 10277778505549. The reversal of 10277778505543 is 34550587777201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10277778505543 - 2¹ = 10277778505541 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 (10277778505541) 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, 369504268 + ... + 369532081.

It is an arithmetic number, because the mean of its divisors is an integer number (2569629388950).

Almost surely, 2^{10277778505543} is an apocalyptic number.

10277778505543 is a deficient number, since it is larger than the sum of its proper divisors (739050257).

10277778505543 is an equidigital number, since it uses as much as digits as its factorization.

10277778505543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739050256.

The product of its (nonzero) digits is 57624000, while the sum is 61.

The spelling of 10277778505543 in words is "ten trillion, two hundred seventy-seven billion, seven hundred seventy-eight million, five hundred five thousand, five hundred forty-three".