1777748481065 has 16 divisors (see below), whose sum is σ = 2191042863360. Its totient is φ = 1383705414720.

The previous prime is 1777748481017. The next prime is 1777748481077. The reversal of 1777748481065 is 5601848477771.

It is a de Polignac number, because none of the positive numbers 2^k-1777748481065 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1777748480992 and 1777748481010.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4770860 + ... + 5129970.

It is an arithmetic number, because the mean of its divisors is an integer number (136940178960).

Almost surely, 2^{1777748481065} is an apocalyptic number.

It is an amenable number.

1777748481065 is a deficient number, since it is larger than the sum of its proper divisors (413294382295).

1777748481065 is a wasteful number, since it uses less digits than its factorization.

1777748481065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385912.

The product of its (nonzero) digits is 73758720, while the sum is 65.

The spelling of 1777748481065 in words is "one trillion, seven hundred seventy-seven billion, seven hundred forty-eight million, four hundred eighty-one thousand, sixty-five".