878045550989 has 8 divisors (see below), whose sum is σ = 883961748600. Its totient is φ = 872129664000.

The previous prime is 878045550973. The next prime is 878045551057. The reversal of 878045550989 is 989055540878.

It can be written as a sum of positive squares in 4 ways, for example, as 153064825225 + 724980725764 = 391235^2 + 851458^2 .

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 878045550989 - 2⁴ = 878045550973 is a prime.

It is a super-2 number, since 2×878045550989² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878045570989) 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, 9843389 + ... + 9932189.

It is an arithmetic number, because the mean of its divisors is an integer number (110495218575).

Almost surely, 2^878045550989 is an apocalyptic number.

It is an amenable number.

878045550989 is a deficient number, since it is larger than the sum of its proper divisors (5916197611).

878045550989 is a wasteful number, since it uses less digits than its factorization.

878045550989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155311.

The product of its (nonzero) digits is 145152000, while the sum is 68.

The spelling of 878045550989 in words is "eight hundred seventy-eight billion, forty-five million, five hundred fifty thousand, nine hundred eighty-nine".