20151065650 has 12 divisors (see below), whose sum is σ = 37480982202. Its totient is φ = 8060426240.

The previous prime is 20151065611. The next prime is 20151065681. The reversal of 20151065650 is 5656015102.

It can be written as a sum of positive squares in 3 ways, for example, as 15964069801 + 4186995849 = 126349^2 + 64707^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 201510607 + ... + 201510706.

Almost surely, 2^20151065650 is an apocalyptic number.

20151065650 is a deficient number, since it is larger than the sum of its proper divisors (17329916552).

20151065650 is a wasteful number, since it uses less digits than its factorization.

20151065650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403021325 (or 403021320 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 31.

The spelling of 20151065650 in words is "twenty billion, one hundred fifty-one million, sixty-five thousand, six hundred fifty".