651614161 has 12 divisors (see below), whose sum is σ = 722590596. Its totient is φ = 587121920.

The previous prime is 651614147. The next prime is 651614167. The reversal of 651614161 is 161416156.

It can be written as a sum of positive squares in 2 ways, for example, as 203233536 + 448380625 = 14256^2 + 21175^2 .

It is not a de Polignac number, because 651614161 - 2⁵ = 651614129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651614167) 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, 10156 + ... + 37501.

It is an arithmetic number, because the mean of its divisors is an integer number (60215883).

Almost surely, 2^651614161 is an apocalyptic number.

It is an amenable number.

651614161 is a deficient number, since it is larger than the sum of its proper divisors (70976435).

651614161 is a wasteful number, since it uses less digits than its factorization.

651614161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47792 (or 47781 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 651614161 is about 25526.7342407916. The cubic root of 651614161 is about 866.9555635660.

The spelling of 651614161 in words is "six hundred fifty-one million, six hundred fourteen thousand, one hundred sixty-one".