7638918730 has 16 divisors (see below), whose sum is σ = 13752887904. Its totient is φ = 3054937680.

The previous prime is 7638918691. The next prime is 7638918757. The reversal of 7638918730 is 378198367.

It is a happy 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, 26112 + ... + 126331.

It is an arithmetic number, because the mean of its divisors is an integer number (859555494).

Almost surely, 2^7638918730 is an apocalyptic number.

7638918730 is a deficient number, since it is larger than the sum of its proper divisors (6113969174).

7638918730 is a wasteful number, since it uses less digits than its factorization.

7638918730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157461.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The square root of 7638918730 is about 87400.9080616443. The cubic root of 7638918730 is about 1969.4454819675.

The spelling of 7638918730 in words is "seven billion, six hundred thirty-eight million, nine hundred eighteen thousand, seven hundred thirty".