2578778235 has 64 divisors (see below), whose sum is σ = 5008988160. Its totient is φ = 1248387840.

The previous prime is 2578778231. The next prime is 2578778317. The reversal of 2578778235 is 5328778752.

2578778235 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2578778235 - 2² = 2578778231 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2578778231) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1628254 + ... + 1629836.

It is an arithmetic number, because the mean of its divisors is an integer number (78265440).

Almost surely, 2^2578778235 is an apocalyptic number.

2578778235 is a deficient number, since it is larger than the sum of its proper divisors (2430209925).

2578778235 is a wasteful number, since it uses less digits than its factorization.

2578778235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2705 (or 2699 counting only the distinct ones).

The product of its digits is 6585600, while the sum is 54.

The square root of 2578778235 is about 50781.6722351677. The cubic root of 2578778235 is about 1371.3174381905.

The spelling of 2578778235 in words is "two billion, five hundred seventy-eight million, seven hundred seventy-eight thousand, two hundred thirty-five".