511978455 has 32 divisors (see below), whose sum is σ = 912261120. Its totient is φ = 272432160.

The previous prime is 511978451. The next prime is 511978501. The reversal of 511978455 is 554879115.

511978455 is a `hidden beast` number, since 5 + 1 + 197 + 8 + 455 = 666.

It is not a de Polignac number, because 511978455 - 2² = 511978451 is a prime.

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 511978455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511978451) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58410 + ... + 66600.

It is an arithmetic number, because the mean of its divisors is an integer number (28508160).

Almost surely, 2^511978455 is an apocalyptic number.

511978455 is a deficient number, since it is larger than the sum of its proper divisors (400282665).

511978455 is a wasteful number, since it uses less digits than its factorization.

511978455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8668 (or 8662 counting only the distinct ones).

The product of its digits is 252000, while the sum is 45.

The square root of 511978455 is about 22626.9409112235. The cubic root of 511978455 is about 799.9887784884.

The spelling of 511978455 in words is "five hundred eleven million, nine hundred seventy-eight thousand, four hundred fifty-five".