650874475921 has 2 divisors, whose sum is σ = 650874475922. Its totient is φ = 650874475920.

The previous prime is 650874475861. The next prime is 650874475967. The reversal of 650874475921 is 129574478056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 518883952896 + 131990523025 = 720336^2 + 363305^2 .

It is a cyclic number.

It is not a de Polignac number, because 650874475921 - 2¹⁹ = 650873951633 is a prime.

It is not a weakly prime, because it can be changed into another prime (650874475981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325437237960 + 325437237961.

It is an arithmetic number, because the mean of its divisors is an integer number (325437237961).

Almost surely, 2^650874475921 is an apocalyptic number.

It is an amenable number.

650874475921 is a deficient number, since it is larger than the sum of its proper divisors (1).

650874475921 is an equidigital number, since it uses as much as digits as its factorization.

650874475921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16934400, while the sum is 58.

The spelling of 650874475921 in words is "six hundred fifty billion, eight hundred seventy-four million, four hundred seventy-five thousand, nine hundred twenty-one".