651244261330 has 16 divisors (see below), whose sum is σ = 1262411952984. Its totient is φ = 240459419520.

The previous prime is 651244261321. The next prime is 651244261331. The reversal of 651244261330 is 33162442156.

It can be written as a sum of positive squares in 4 ways, for example, as 219126035881 + 432118225449 = 468109^2 + 657357^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 651244261330.

It is not an unprimeable number, because it can be changed into a prime (651244261331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2504785491 + ... + 2504785750.

Almost surely, 2^651244261330 is an apocalyptic number.

651244261330 is a deficient number, since it is larger than the sum of its proper divisors (611167691654).

651244261330 is a wasteful number, since it uses less digits than its factorization.

651244261330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5009571261.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 651244261330 in words is "six hundred fifty-one billion, two hundred forty-four million, two hundred sixty-one thousand, three hundred thirty".