648196771361 has 8 divisors (see below), whose sum is σ = 657985679424. Its totient is φ = 638426179440.

The previous prime is 648196771307. The next prime is 648196771427. The reversal of 648196771361 is 163177691846.

It is a happy number.

648196771361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648196771361 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 648196771361.

It is not an unprimeable number, because it can be changed into a prime (648196771301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4507715 + ... + 4649288.

It is an arithmetic number, because the mean of its divisors is an integer number (82248209928).

Almost surely, 2^648196771361 is an apocalyptic number.

It is an amenable number.

648196771361 is a deficient number, since it is larger than the sum of its proper divisors (9788908063).

648196771361 is an equidigital number, since it uses as much as digits as its factorization.

648196771361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9158071.

The product of its digits is 9144576, while the sum is 59.

The spelling of 648196771361 in words is "six hundred forty-eight billion, one hundred ninety-six million, seven hundred seventy-one thousand, three hundred sixty-one".