7287810161 has 8 divisors (see below), whose sum is σ = 7337537064. Its totient is φ = 7238125440.

The previous prime is 7287810143. The next prime is 7287810163. The reversal of 7287810161 is 1610187827.

It can be written as a sum of positive squares in 4 ways, for example, as 335585761 + 6952224400 = 18319^2 + 83380^2 .

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 7287810161 - 2⁶ = 7287810097 is a prime.

It is a super-2 number, since 2×7287810161² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7287810163) 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, 386591 + ... + 405003.

It is an arithmetic number, because the mean of its divisors is an integer number (917192133).

Almost surely, 2^7287810161 is an apocalyptic number.

It is an amenable number.

7287810161 is a deficient number, since it is larger than the sum of its proper divisors (49726903).

7287810161 is a wasteful number, since it uses less digits than its factorization.

7287810161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21091.

The product of its (nonzero) digits is 37632, while the sum is 41.

The square root of 7287810161 is about 85368.6720114586. The cubic root of 7287810161 is about 1938.7970507577.

Adding to 7287810161 its reverse (1610187827), we get a palindrome (8897997988).

The spelling of 7287810161 in words is "seven billion, two hundred eighty-seven million, eight hundred ten thousand, one hundred sixty-one".