249798089621970 has 80 divisors (see below), whose sum is σ = 672066893254680. Its totient is φ = 66574385657856.

The previous prime is 249798089621929. The next prime is 249798089622049. The reversal of 249798089621970 is 79126980897942.

249798089621970 is a `hidden beast` number, since 249 + 7 + 9 + 8 + 0 + 8 + 96 + 219 + 70 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 234214772821929 + 15583316800041 = 15304077^2 + 3947571^2 .

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a self number, because there is not a number n which added to its sum of digits gives 249798089621970.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 87572815 + ... + 90380274.

Almost surely, 2^{249798089621970} is an apocalyptic number.

249798089621970 is an abundant number, since it is smaller than the sum of its proper divisors (422268803632710).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

249798089621970 is a wasteful number, since it uses less digits than its factorization.

249798089621970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177954841 (or 177954832 counting only the distinct ones).

The product of its (nonzero) digits is 1975228416, while the sum is 81.

The spelling of 249798089621970 in words is "two hundred forty-nine trillion, seven hundred ninety-eight billion, eighty-nine million, six hundred twenty-one thousand, nine hundred seventy".