1278062773651 has 4 divisors (see below), whose sum is σ = 1291238678632. Its totient is φ = 1264886868672.

The previous prime is 1278062773619. The next prime is 1278062773657. The reversal of 1278062773651 is 1563772608721.

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 1278062773651 - 2⁵ = 1278062773619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1278062773592 and 1278062773601.

It is not an unprimeable number, because it can be changed into a prime (1278062773657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6587952345 + ... + 6587952538.

It is an arithmetic number, because the mean of its divisors is an integer number (322809669658).

Almost surely, 2^{1278062773651} is an apocalyptic number.

1278062773651 is a deficient number, since it is larger than the sum of its proper divisors (13175904981).

1278062773651 is an equidigital number, since it uses as much as digits as its factorization.

1278062773651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13175904980.

The product of its (nonzero) digits is 5927040, while the sum is 55.

The spelling of 1278062773651 in words is "one trillion, two hundred seventy-eight billion, sixty-two million, seven hundred seventy-three thousand, six hundred fifty-one".