1651161165 has 8 divisors (see below), whose sum is σ = 2641857888. Its totient is φ = 880619280.

The previous prime is 1651161157. The next prime is 1651161167. The reversal of 1651161165 is 5611611561.

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

It is not a de Polignac number, because 1651161165 - 2³ = 1651161157 is a prime.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 55038691 + ... + 55038720.

It is an arithmetic number, because the mean of its divisors is an integer number (330232236).

Almost surely, 2^1651161165 is an apocalyptic number.

1651161165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1651161165 is a deficient number, since it is larger than the sum of its proper divisors (990696723).

1651161165 is a wasteful number, since it uses less digits than its factorization.

1651161165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110077419.

The product of its digits is 5400, while the sum is 33.

The square root of 1651161165 is about 40634.4824625588. The cubic root of 1651161165 is about 1181.9428791886.

The spelling of 1651161165 in words is "one billion, six hundred fifty-one million, one hundred sixty-one thousand, one hundred sixty-five".