650640636403 has 2 divisors, whose sum is σ = 650640636404. Its totient is φ = 650640636402.

The previous prime is 650640636391. The next prime is 650640636407. The reversal of 650640636403 is 304636046056.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 650640636403 - 2¹⁷ = 650640505331 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 650640636403.

It is not a weakly prime, because it can be changed into another prime (650640636407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325320318201 + 325320318202.

It is an arithmetic number, because the mean of its divisors is an integer number (325320318202).

Almost surely, 2^650640636403 is an apocalyptic number.

650640636403 is a deficient number, since it is larger than the sum of its proper divisors (1).

650640636403 is an equidigital number, since it uses as much as digits as its factorization.

650640636403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 43.

The spelling of 650640636403 in words is "six hundred fifty billion, six hundred forty million, six hundred thirty-six thousand, four hundred three".