651649239501 has 16 divisors (see below), whose sum is σ = 935874065280. Its totient is φ = 400940948160.

The previous prime is 651649239487. The next prime is 651649239517. The reversal of 651649239501 is 105932946156.

It is not a de Polignac number, because 651649239501 - 2²² = 651645045197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (651649259501) 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, 1326486 + ... + 1750103.

It is an arithmetic number, because the mean of its divisors is an integer number (58492129080).

Almost surely, 2^651649239501 is an apocalyptic number.

It is an amenable number.

651649239501 is a deficient number, since it is larger than the sum of its proper divisors (284224825779).

651649239501 is a wasteful number, since it uses less digits than its factorization.

651649239501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3082036.

The product of its (nonzero) digits is 1749600, while the sum is 51.

The spelling of 651649239501 in words is "six hundred fifty-one billion, six hundred forty-nine million, two hundred thirty-nine thousand, five hundred one".