249864387770 has 16 divisors (see below), whose sum is σ = 449778279168. Its totient is φ = 99940781520.

The previous prime is 249864387767. The next prime is 249864387791. The reversal of 249864387770 is 77783468942.

It is a junction number, because it is equal to n+sod(n) for n = 249864387697 and 249864387706.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407174 + ... + 815793.

It is an arithmetic number, because the mean of its divisors is an integer number (28111142448).

Almost surely, 2^249864387770 is an apocalyptic number.

249864387770 is a deficient number, since it is larger than the sum of its proper divisors (199913891398).

249864387770 is a wasteful number, since it uses less digits than its factorization.

249864387770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243405.

The product of its (nonzero) digits is 113799168, while the sum is 65.

The spelling of 249864387770 in words is "two hundred forty-nine billion, eight hundred sixty-four million, three hundred eighty-seven thousand, seven hundred seventy".