649120262401 has 8 divisors (see below), whose sum is σ = 701540325864. Its totient is φ = 597055589760.

The previous prime is 649120262383. The next prime is 649120262423. The reversal of 649120262401 is 104262021946.

It is a Cunningham number, because it is equal to 805680²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 649120262400 = 1^2 + 805680^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 649120262401 - 2²¹ = 649118165249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649120262701) 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, 88843906 + ... + 88851211.

It is an arithmetic number, because the mean of its divisors is an integer number (87692540733).

Almost surely, 2^649120262401 is an apocalyptic number.

It is an amenable number.

649120262401 is a deficient number, since it is larger than the sum of its proper divisors (52420063463).

649120262401 is a wasteful number, since it uses less digits than its factorization.

649120262401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177695411.

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 649120262401 in words is "six hundred forty-nine billion, one hundred twenty million, two hundred sixty-two thousand, four hundred one".