2002778886765 has 16 divisors (see below), whose sum is σ = 3204903316608. Its totient is φ = 1067996373696.

The previous prime is 2002778886721. The next prime is 2002778886791. The reversal of 2002778886765 is 5676888772002.

It is not a de Polignac number, because 2002778886765 - 2⁶ = 2002778886701 is a prime.

It is a super-2 number, since 2×2002778886765² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2002778886696 and 2002778886705.

It is a congruent number.

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, 9414169 + ... + 9624558.

It is an arithmetic number, because the mean of its divisors is an integer number (200306457288).

Almost surely, 2^{2002778886765} is an apocalyptic number.

It is an amenable number.

2002778886765 is a deficient number, since it is larger than the sum of its proper divisors (1202124429843).

2002778886765 is a wasteful number, since it uses less digits than its factorization.

2002778886765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19045748.

The product of its (nonzero) digits is 126443520, while the sum is 66.

The spelling of 2002778886765 in words is "two trillion, two billion, seven hundred seventy-eight million, eight hundred eighty-six thousand, seven hundred sixty-five".