2620865478 has 32 divisors (see below), whose sum is σ = 6535146240. Its totient is φ = 680744160.

The previous prime is 2620865461. The next prime is 2620865483. The reversal of 2620865478 is 8745680262.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2835973 + ... + 2836896.

It is an arithmetic number, because the mean of its divisors is an integer number (204223320).

Almost surely, 2^2620865478 is an apocalyptic number.

2620865478 is an abundant number, since it is smaller than the sum of its proper divisors (3914280762).

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

2620865478 is a wasteful number, since it uses less digits than its factorization.

2620865478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5672892.

The product of its (nonzero) digits is 1290240, while the sum is 48.

The square root of 2620865478 is about 51194.3891261533. The cubic root of 2620865478 is about 1378.7374642700.

The spelling of 2620865478 in words is "two billion, six hundred twenty million, eight hundred sixty-five thousand, four hundred seventy-eight".