651131366240 has 48 divisors (see below), whose sum is σ = 1551911151168. Its totient is φ = 258147649536.

The previous prime is 651131366219. The next prime is 651131366293. The reversal of 651131366240 is 42663131156.

It is a super-2 number, since 2×651131366240² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 651131366194 and 651131366203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17988872 + ... + 18025031.

It is an arithmetic number, because the mean of its divisors is an integer number (32331482316).

Almost surely, 2^651131366240 is an apocalyptic number.

It is an amenable number.

651131366240 is an abundant number, since it is smaller than the sum of its proper divisors (900779784928).

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

651131366240 is a wasteful number, since it uses less digits than its factorization.

651131366240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36014031 (or 36014023 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

Adding to 651131366240 its reverse (42663131156), we get a palindrome (693794497396).

The spelling of 651131366240 in words is "six hundred fifty-one billion, one hundred thirty-one million, three hundred sixty-six thousand, two hundred forty".