653852778 has 16 divisors (see below), whose sum is σ = 1329144096. Its totient is φ = 214377840.

The previous prime is 653852777. The next prime is 653852779. The reversal of 653852778 is 877258356.

It is an interprime number because it is at equal distance from previous prime (653852777) and next prime (653852779).

It is a self number, because there is not a number n which added to its sum of digits gives 653852778.

It is not an unprimeable number, because it can be changed into a prime (653852777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 892876 + ... + 893607.

It is an arithmetic number, because the mean of its divisors is an integer number (83071506).

Almost surely, 2^653852778 is an apocalyptic number.

653852778 is an abundant number, since it is smaller than the sum of its proper divisors (675291318).

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

653852778 is a wasteful number, since it uses less digits than its factorization.

653852778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1786549.

The product of its digits is 2822400, while the sum is 51.

The square root of 653852778 is about 25570.5451252022. The cubic root of 653852778 is about 867.9472358860.

The spelling of 653852778 in words is "six hundred fifty-three million, eight hundred fifty-two thousand, seven hundred seventy-eight".