249947908660 has 24 divisors (see below), whose sum is σ = 525030105600. Its totient is φ = 99952592544.

The previous prime is 249947908643. The next prime is 249947908673. The reversal of 249947908660 is 66809749942.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 249947908592 and 249947908601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1583460 + ... + 1734139.

It is an arithmetic number, because the mean of its divisors is an integer number (21876254400).

Almost surely, 2^249947908660 is an apocalyptic number.

249947908660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249947908660 is an abundant number, since it is smaller than the sum of its proper divisors (275082196940).

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

249947908660 is a wasteful number, since it uses less digits than its factorization.

249947908660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3321375 (or 3321373 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 64.

The spelling of 249947908660 in words is "two hundred forty-nine billion, nine hundred forty-seven million, nine hundred eight thousand, six hundred sixty".