878544412249 has 27 divisors (see below), whose sum is σ = 1027728975357. Its totient is φ = 748825809984.

The previous prime is 878544412237. The next prime is 878544412301. The reversal of 878544412249 is 942214445878.

It is a happy number.

The square root of 878544412249 is 937307.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 589681160649 + 288863251600 = 767907^2 + 537460^2 .

It is not a de Polignac number, because 878544412249 - 2¹³ = 878544404057 is a prime.

It is a super-2 number, since 2×878544412249² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 878544412193 and 878544412202.

It is not an unprimeable number, because it can be changed into a prime (878544412219) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1922416429 + ... + 1922416885.

Almost surely, 2^878544412249 is an apocalyptic number.

878544412249 is the 937307-th square number.

878544412249 is the 468654-th centered octagonal number.

It is an amenable number.

878544412249 is a deficient number, since it is larger than the sum of its proper divisors (149184563108).

878544412249 is an frugal number, since it uses more digits than its factorization.

878544412249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514 (or 757 counting only the distinct ones).

The product of its digits is 20643840, while the sum is 58.

The spelling of 878544412249 in words is "eight hundred seventy-eight billion, five hundred forty-four million, four hundred twelve thousand, two hundred forty-nine".