651290815129 has 4 divisors (see below), whose sum is σ = 652883213620. Its totient is φ = 649698416640.

The previous prime is 651290815037. The next prime is 651290815139. The reversal of 651290815129 is 921518092156.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 244552997529 + 406737817600 = 494523^2 + 637760^2 .

It is a cyclic number.

It is not a de Polignac number, because 651290815129 - 2¹⁵ = 651290782361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (651290815139) 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, 796198632 + ... + 796199449.

It is an arithmetic number, because the mean of its divisors is an integer number (163220803405).

Almost surely, 2^651290815129 is an apocalyptic number.

It is an amenable number.

651290815129 is a deficient number, since it is larger than the sum of its proper divisors (1592398491).

651290815129 is a wasteful number, since it uses less digits than its factorization.

651290815129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1592398490.

The product of its (nonzero) digits is 388800, while the sum is 49.

The spelling of 651290815129 in words is "six hundred fifty-one billion, two hundred ninety million, eight hundred fifteen thousand, one hundred twenty-nine".