651000475521 has 16 divisors (see below), whose sum is σ = 1052121981120. Its totient is φ = 394545742560.

The previous prime is 651000475513. The next prime is 651000475529. The reversal of 651000475521 is 125574000156.

651000475521 is a `hidden beast` number, since 65 + 1 + 0 + 0 + 0 + 4 + 75 + 521 = 666.

It is an interprime number because it is at equal distance from previous prime (651000475513) and next prime (651000475529).

It is not a de Polignac number, because 651000475521 - 2³ = 651000475513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (651000475529) 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, 1095960100 + ... + 1095960693.

It is an arithmetic number, because the mean of its divisors is an integer number (65757623820).

Almost surely, 2^651000475521 is an apocalyptic number.

It is an amenable number.

651000475521 is a deficient number, since it is larger than the sum of its proper divisors (401121505599).

651000475521 is a wasteful number, since it uses less digits than its factorization.

651000475521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2191920813 (or 2191920807 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 36.

Adding to 651000475521 its reverse (125574000156), we get a palindrome (776574475677).

The spelling of 651000475521 in words is "six hundred fifty-one billion, four hundred seventy-five thousand, five hundred twenty-one".