651610420 has 12 divisors (see below), whose sum is σ = 1368381924. Its totient is φ = 260644160.

The previous prime is 651610409. The next prime is 651610423. The reversal of 651610420 is 24016156.

651610420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 318693904 + 332916516 = 17852^2 + 18246^2 .

It is a super-2 number, since 2×651610420² = 849192278905152800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651610423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16290241 + ... + 16290280.

It is an arithmetic number, because the mean of its divisors is an integer number (114031827).

Almost surely, 2^651610420 is an apocalyptic number.

It is an amenable number.

651610420 is an abundant number, since it is smaller than the sum of its proper divisors (716771504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

651610420 is a wasteful number, since it uses less digits than its factorization.

651610420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32580530 (or 32580528 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 651610420 is about 25526.6609645680. The cubic root of 651610420 is about 866.9539044620.

Adding to 651610420 its reverse (24016156), we get a palindrome (675626576).

The spelling of 651610420 in words is "six hundred fifty-one million, six hundred ten thousand, four hundred twenty".