651613123 has 48 divisors (see below), whose sum is σ = 812657664. Its totient is φ = 520248960.

The previous prime is 651613097. The next prime is 651613129. The reversal of 651613123 is 321316156.

It is not a de Polignac number, because 651613123 - 2¹³ = 651604931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 651613091 and 651613100.

It is not an unprimeable number, because it can be changed into a prime (651613129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6326290 + ... + 6326392.

It is an arithmetic number, because the mean of its divisors is an integer number (16930368).

Almost surely, 2^651613123 is an apocalyptic number.

651613123 is a deficient number, since it is larger than the sum of its proper divisors (161044541).

651613123 is a wasteful number, since it uses less digits than its factorization.

651613123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 265 counting only the distinct ones).

The product of its digits is 3240, while the sum is 28.

The square root of 651613123 is about 25526.7139091580. The cubic root of 651613123 is about 866.9551032219.

Adding to 651613123 its reverse (321316156), we get a palindrome (972929279).

The spelling of 651613123 in words is "six hundred fifty-one million, six hundred thirteen thousand, one hundred twenty-three".