650478551 has 2 divisors, whose sum is σ = 650478552. Its totient is φ = 650478550.

The previous prime is 650478533. The next prime is 650478557. The reversal of 650478551 is 155874056.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-650478551 is a prime.

It is a super-2 number, since 2×650478551² = 846244690622119202, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 650478499 and 650478508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (650478557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325239275 + 325239276.

It is an arithmetic number, because the mean of its divisors is an integer number (325239276).

Almost surely, 2^650478551 is an apocalyptic number.

650478551 is a deficient number, since it is larger than the sum of its proper divisors (1).

650478551 is an equidigital number, since it uses as much as digits as its factorization.

650478551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168000, while the sum is 41.

The square root of 650478551 is about 25504.4809984442. The cubic root of 650478551 is about 866.4516375969.

The spelling of 650478551 in words is "six hundred fifty million, four hundred seventy-eight thousand, five hundred fifty-one".