20151065651 has 8 divisors (see below), whose sum is σ = 21348836784. Its totient is φ = 18954673920.

The previous prime is 20151065611. The next prime is 20151065681. The reversal of 20151065651 is 15656015102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20151065651 - 2²⁶ = 20083956787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20151065611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314690 + ... + 373271.

It is an arithmetic number, because the mean of its divisors is an integer number (2668604598).

Almost surely, 2^20151065651 is an apocalyptic number.

20151065651 is a deficient number, since it is larger than the sum of its proper divisors (1197771133).

20151065651 is a wasteful number, since it uses less digits than its factorization.

20151065651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689701.

The product of its (nonzero) digits is 9000, while the sum is 32.

The spelling of 20151065651 in words is "twenty billion, one hundred fifty-one million, sixty-five thousand, six hundred fifty-one".