1651161161 has 16 divisors (see below), whose sum is σ = 1898144640. Its totient is φ = 1423578240.

The previous prime is 1651161157. The next prime is 1651161167. The reversal of 1651161161 is 1611611561.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1651161161 - 2² = 1651161157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1651161167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29540 + ... + 64613.

It is an arithmetic number, because the mean of its divisors is an integer number (118634040).

Almost surely, 2^1651161161 is an apocalyptic number.

It is an amenable number.

1651161161 is a deficient number, since it is larger than the sum of its proper divisors (246983479).

1651161161 is a wasteful number, since it uses less digits than its factorization.

1651161161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94256.

The product of its digits is 1080, while the sum is 29.

The square root of 1651161161 is about 40634.4824133395. The cubic root of 1651161161 is about 1181.9428782341.

The spelling of 1651161161 in words is "one billion, six hundred fifty-one million, one hundred sixty-one thousand, one hundred sixty-one".