890378720501 has 4 divisors (see below), whose sum is σ = 942753939372. Its totient is φ = 838003501632.

The previous prime is 890378720459. The next prime is 890378720507. The reversal of 890378720501 is 105027873098.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 105027873098 = 2 ⋅52513936549.

It can be written as a sum of positive squares in 2 ways, for example, as 823982830225 + 66395890276 = 907735^2 + 257674^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-890378720501 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 890378720501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (890378720507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26187609410 + ... + 26187609443.

It is an arithmetic number, because the mean of its divisors is an integer number (235688484843).

Almost surely, 2^890378720501 is an apocalyptic number.

It is an amenable number.

890378720501 is a deficient number, since it is larger than the sum of its proper divisors (52375218871).

890378720501 is a wasteful number, since it uses less digits than its factorization.

890378720501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52375218870.

The product of its (nonzero) digits is 846720, while the sum is 50.

The spelling of 890378720501 in words is "eight hundred ninety billion, three hundred seventy-eight million, seven hundred twenty thousand, five hundred one".