651402898737881 has 2 divisors, whose sum is σ = 651402898737882. Its totient is φ = 651402898737880.

The previous prime is 651402898737853. The next prime is 651402898737917. The reversal of 651402898737881 is 188737898204156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 634075659977881 + 17327238760000 = 25180859^2 + 4162600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-651402898737881 is a prime.

It is a super-2 number, since 2×651402898737881² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (651402898737781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325701449368940 + 325701449368941.

It is an arithmetic number, because the mean of its divisors is an integer number (325701449368941).

It is a 2-persistent number, because it is pandigital, and so is 2⋅651402898737881 = 1302805797475762, but 3⋅651402898737881 = 1954208696213643 is not.

Almost surely, 2^{651402898737881} is an apocalyptic number.

It is an amenable number.

651402898737881 is a deficient number, since it is larger than the sum of its proper divisors (1).

651402898737881 is an equidigital number, since it uses as much as digits as its factorization.

651402898737881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1300561920, while the sum is 77.

The spelling of 651402898737881 in words is "six hundred fifty-one trillion, four hundred two billion, eight hundred ninety-eight million, seven hundred thirty-seven thousand, eight hundred eighty-one".