2650780388 has 6 divisors (see below), whose sum is σ = 4638865686. Its totient is φ = 1325390192.

The previous prime is 2650780373. The next prime is 2650780393. The reversal of 2650780388 is 8830870562.

It can be written as a sum of positive squares in only one way, i.e., 1684938304 + 965842084 = 41048^2 + 31078^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331347545 + ... + 331347552.

It is an arithmetic number, because the mean of its divisors is an integer number (773144281).

Almost surely, 2^2650780388 is an apocalyptic number.

It is an amenable number.

2650780388 is a deficient number, since it is larger than the sum of its proper divisors (1988085298).

2650780388 is a wasteful number, since it uses less digits than its factorization.

2650780388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662695101 (or 662695099 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 47.

The square root of 2650780388 is about 51485.7299452965. The cubic root of 2650780388 is about 1383.9633296052.

The spelling of 2650780388 in words is "two billion, six hundred fifty million, seven hundred eighty thousand, three hundred eighty-eight".