650556261651 has 4 divisors (see below), whose sum is σ = 867408348872. Its totient is φ = 433704174432.

The previous prime is 650556261577. The next prime is 650556261709. The reversal of 650556261651 is 156162655056.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 650556261651 - 2¹⁷ = 650556130579 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 650556261651.

It is not an unprimeable number, because it can be changed into a prime (650556262651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108426043606 + ... + 108426043611.

It is an arithmetic number, because the mean of its divisors is an integer number (216852087218).

Almost surely, 2^650556261651 is an apocalyptic number.

650556261651 is a deficient number, since it is larger than the sum of its proper divisors (216852087221).

650556261651 is a wasteful number, since it uses less digits than its factorization.

650556261651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216852087220.

The product of its (nonzero) digits is 1620000, while the sum is 48.

The spelling of 650556261651 in words is "six hundred fifty billion, five hundred fifty-six million, two hundred sixty-one thousand, six hundred fifty-one".