651915234391 has 2 divisors, whose sum is σ = 651915234392. Its totient is φ = 651915234390.

The previous prime is 651915234379. The next prime is 651915234431. The reversal of 651915234391 is 193432519156.

651915234391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-651915234391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (651915234301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325957617195 + 325957617196.

It is an arithmetic number, because the mean of its divisors is an integer number (325957617196).

Almost surely, 2^651915234391 is an apocalyptic number.

651915234391 is a deficient number, since it is larger than the sum of its proper divisors (1).

651915234391 is an equidigital number, since it uses as much as digits as its factorization.

651915234391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 874800, while the sum is 49.

The spelling of 651915234391 in words is "six hundred fifty-one billion, nine hundred fifteen million, two hundred thirty-four thousand, three hundred ninety-one".