65478034388 has 12 divisors (see below), whose sum is σ = 123400911060. Its totient is φ = 30220631232.

The previous prime is 65478034381. The next prime is 65478034393. The reversal of 65478034388 is 88343087456.

It can be written as a sum of positive squares in 2 ways, for example, as 45180903364 + 20297131024 = 212558^2 + 142468^2 .

It is a super-2 number, since 2×65478034388² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65478034381) 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, 629596433 + ... + 629596536.

It is an arithmetic number, because the mean of its divisors is an integer number (10283409255).

Almost surely, 2^65478034388 is an apocalyptic number.

It is an amenable number.

65478034388 is a deficient number, since it is larger than the sum of its proper divisors (57922876672).

65478034388 is a wasteful number, since it uses less digits than its factorization.

65478034388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1259192986 (or 1259192984 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 56.

The spelling of 65478034388 in words is "sixty-five billion, four hundred seventy-eight million, thirty-four thousand, three hundred eighty-eight".