10278451017649 has 4 divisors (see below), whose sum is σ = 10278542923636. Its totient is φ = 10278359111664.

The previous prime is 10278451017547. The next prime is 10278451017691. The reversal of 10278451017649 is 94671015487201.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1799871777649 + 8478579240000 = 1341593^2 + 2911800^2 .

It is a cyclic number.

It is not a de Polignac number, because 10278451017649 - 2⁷ = 10278451017521 is a prime.

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 10278451017649.

It is not an unprimeable number, because it can be changed into a prime (10278451077649) 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, 45785034 + ... + 46008979.

It is an arithmetic number, because the mean of its divisors is an integer number (2569635730909).

Almost surely, 2^{10278451017649} is an apocalyptic number.

It is an amenable number.

10278451017649 is a deficient number, since it is larger than the sum of its proper divisors (91905987).

10278451017649 is an equidigital number, since it uses as much as digits as its factorization.

10278451017649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91905986.

The product of its (nonzero) digits is 3386880, while the sum is 55.

The spelling of 10278451017649 in words is "ten trillion, two hundred seventy-eight billion, four hundred fifty-one million, seventeen thousand, six hundred forty-nine".