64965478420 has 12 divisors (see below), whose sum is σ = 136427504724. Its totient is φ = 25986191360.

The previous prime is 64965478363. The next prime is 64965478421. The reversal of 64965478420 is 2487456946.

It can be written as a sum of positive squares in 2 ways, for example, as 12380567824 + 52584910596 = 111268^2 + 229314^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64965478421) 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, 1624136941 + ... + 1624136980.

It is an arithmetic number, because the mean of its divisors is an integer number (11368958727).

Almost surely, 2^64965478420 is an apocalyptic number.

It is an amenable number.

64965478420 is an abundant number, since it is smaller than the sum of its proper divisors (71462026304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64965478420 is a wasteful number, since it uses less digits than its factorization.

64965478420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3248273930 (or 3248273928 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 55.

The spelling of 64965478420 in words is "sixty-four billion, nine hundred sixty-five million, four hundred seventy-eight thousand, four hundred twenty".