651161871 has 12 divisors (see below), whose sum is σ = 940918680. Its totient is φ = 433945680.

The previous prime is 651161867. The next prime is 651161879. The reversal of 651161871 is 178161156.

651161871 is a `hidden beast` number, since 6 + 511 + 61 + 87 + 1 = 666.

It is not a de Polignac number, because 651161871 - 2² = 651161867 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651161879) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15085 + ... + 39113.

It is an arithmetic number, because the mean of its divisors is an integer number (78409890).

Almost surely, 2^651161871 is an apocalyptic number.

651161871 is a deficient number, since it is larger than the sum of its proper divisors (289756809).

651161871 is a wasteful number, since it uses less digits than its factorization.

651161871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27046 (or 27043 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 651161871 is about 25517.8735595269. The cubic root of 651161871 is about 866.7549304748.

The spelling of 651161871 in words is "six hundred fifty-one million, one hundred sixty-one thousand, eight hundred seventy-one".