7764378065 has 16 divisors (see below), whose sum is σ = 9792316800. Its totient is φ = 5898680832.

The previous prime is 7764378059. The next prime is 7764378121. The reversal of 7764378065 is 5608734677.

It is not a de Polignac number, because 7764378065 - 2⁶ = 7764378001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7764377998 and 7764378016.

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, 226880 + ... + 258849.

It is an arithmetic number, because the mean of its divisors is an integer number (612019800).

Almost surely, 2^7764378065 is an apocalyptic number.

It is an amenable number.

7764378065 is a deficient number, since it is larger than the sum of its proper divisors (2027938735).

7764378065 is a wasteful number, since it uses less digits than its factorization.

7764378065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485896.

The product of its (nonzero) digits is 5927040, while the sum is 53.

The square root of 7764378065 is about 88115.7083895942. The cubic root of 7764378065 is about 1980.1688514472.

The spelling of 7764378065 in words is "seven billion, seven hundred sixty-four million, three hundred seventy-eight thousand, sixty-five".