2620763646 has 16 divisors (see below), whose sum is σ = 5242521744. Its totient is φ = 873422144.

The previous prime is 2620763633. The next prime is 2620763731. The reversal of 2620763646 is 6463670262.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2620763598 and 2620763607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4665 + ... + 72548.

It is an arithmetic number, because the mean of its divisors is an integer number (327657609).

Almost surely, 2^2620763646 is an apocalyptic number.

2620763646 is an abundant number, since it is smaller than the sum of its proper divisors (2621758098).

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

2620763646 is a wasteful number, since it uses less digits than its factorization.

2620763646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82875.

The product of its (nonzero) digits is 435456, while the sum is 42.

The square root of 2620763646 is about 51193.3945543759. The cubic root of 2620763646 is about 1378.7196073937.

The spelling of 2620763646 in words is "two billion, six hundred twenty million, seven hundred sixty-three thousand, six hundred forty-six".