465278778653 has 8 divisors (see below), whose sum is σ = 501286493400. Its totient is φ = 429302069568.

The previous prime is 465278778641. The next prime is 465278778709. The reversal of 465278778653 is 356877872564.

It can be written as a sum of positive squares in 4 ways, for example, as 36886275364 + 428392503289 = 192058^2 + 654517^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 465278778653 - 2¹² = 465278774557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (465278778253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7720238 + ... + 7780271.

It is an arithmetic number, because the mean of its divisors is an integer number (62660811675).

Almost surely, 2^465278778653 is an apocalyptic number.

It is an amenable number.

465278778653 is a deficient number, since it is larger than the sum of its proper divisors (36007714747).

465278778653 is a wasteful number, since it uses less digits than its factorization.

465278778653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15502831.

The product of its digits is 474163200, while the sum is 68.

The spelling of 465278778653 in words is "four hundred sixty-five billion, two hundred seventy-eight million, seven hundred seventy-eight thousand, six hundred fifty-three".