878987746501 has 2 divisors, whose sum is σ = 878987746502. Its totient is φ = 878987746500.

The previous prime is 878987746477. The next prime is 878987746573. The reversal of 878987746501 is 105647789878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 878670015876 + 317730625 = 937374^2 + 17825^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-878987746501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (878987741501) 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 as a sum of consecutive naturals, namely, 439493873250 + 439493873251.

It is an arithmetic number, because the mean of its divisors is an integer number (439493873251).

Almost surely, 2^878987746501 is an apocalyptic number.

It is an amenable number.

878987746501 is a deficient number, since it is larger than the sum of its proper divisors (1).

878987746501 is an equidigital number, since it uses as much as digits as its factorization.

878987746501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189665280, while the sum is 70.

The spelling of 878987746501 in words is "eight hundred seventy-eight billion, nine hundred eighty-seven million, seven hundred forty-six thousand, five hundred one".