2617985678 has 32 divisors (see below), whose sum is σ = 4976252928. Its totient is φ = 1003269600.

The previous prime is 2617985677. The next prime is 2617985683. The reversal of 2617985678 is 8765897162.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2617985677) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129950 + ... + 148737.

It is an arithmetic number, because the mean of its divisors is an integer number (155507904).

Almost surely, 2^2617985678 is an apocalyptic number.

2617985678 is a deficient number, since it is larger than the sum of its proper divisors (2358267250).

2617985678 is a wasteful number, since it uses less digits than its factorization.

2617985678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278768.

The product of its digits is 10160640, while the sum is 59.

The square root of 2617985678 is about 51166.2552665328. The cubic root of 2617985678 is about 1378.2322948485.

The spelling of 2617985678 in words is "two billion, six hundred seventeen million, nine hundred eighty-five thousand, six hundred seventy-eight".