650065505151561 has 4 divisors (see below), whose sum is σ = 866754006868752. Its totient is φ = 433377003434372.

The previous prime is 650065505151541. The next prime is 650065505151611. The reversal of 650065505151561 is 165151505560056.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 650065505151561 - 2²⁹ = 650064968280649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (650065505151511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108344250858591 + ... + 108344250858596.

It is an arithmetic number, because the mean of its divisors is an integer number (216688501717188).

Almost surely, 2^{650065505151561} is an apocalyptic number.

It is an amenable number.

650065505151561 is a deficient number, since it is larger than the sum of its proper divisors (216688501717191).

650065505151561 is a wasteful number, since it uses less digits than its factorization.

650065505151561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216688501717190.

The product of its (nonzero) digits is 3375000, while the sum is 51.

The spelling of 650065505151561 in words is "six hundred fifty trillion, sixty-five billion, five hundred five million, one hundred fifty-one thousand, five hundred sixty-one".