879781555601 has 8 divisors (see below), whose sum is σ = 947471305704. Its totient is φ = 812093840640.

The previous prime is 879781555559. The next prime is 879781555661. The reversal of 879781555601 is 106555187978.

It can be written as a sum of positive squares in 4 ways, for example, as 120652717201 + 759128838400 = 347351^2 + 871280^2 .

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-879781555601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (879781555661) 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 7 ways as a sum of consecutive naturals, for example, 456971 + ... + 1402991.

It is an arithmetic number, because the mean of its divisors is an integer number (118433913213).

Almost surely, 2^879781555601 is an apocalyptic number.

It is an amenable number.

879781555601 is a deficient number, since it is larger than the sum of its proper divisors (67689750103).

879781555601 is a wasteful number, since it uses less digits than its factorization.

879781555601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017571.

The product of its (nonzero) digits is 21168000, while the sum is 62.

The spelling of 879781555601 in words is "eight hundred seventy-nine billion, seven hundred eighty-one million, five hundred fifty-five thousand, six hundred one".