53331780465 has 48 divisors (see below), whose sum is σ = 95462954496. Its totient is φ = 27514771200.

The previous prime is 53331780457. The next prime is 53331780473. The reversal of 53331780465 is 56408713335.

53331780465 is a `hidden beast` number, since 533 + 3 + 1 + 78 + 0 + 46 + 5 = 666.

53331780465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (53331780457) and next prime (53331780473).

It is not a de Polignac number, because 53331780465 - 2³ = 53331780457 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 53331780465.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4193997 + ... + 4206693.

It is an arithmetic number, because the mean of its divisors is an integer number (1988811552).

Almost surely, 2^53331780465 is an apocalyptic number.

It is an amenable number.

53331780465 is a deficient number, since it is larger than the sum of its proper divisors (42131174031).

53331780465 is a wasteful number, since it uses less digits than its factorization.

53331780465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15750 (or 15747 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 53331780465 in words is "fifty-three billion, three hundred thirty-one million, seven hundred eighty thousand, four hundred sixty-five".