245371610644 has 6 divisors (see below), whose sum is σ = 429400318634. Its totient is φ = 122685805320.

The previous prime is 245371610639. The next prime is 245371610647. The reversal of 245371610644 is 446016173542.

It can be written as a sum of positive squares in only one way, i.e., 204676617744 + 40694992900 = 452412^2 + 201730^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 245371610644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245371610647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30671451327 + ... + 30671451334.

Almost surely, 2^245371610644 is an apocalyptic number.

It is an amenable number.

245371610644 is a deficient number, since it is larger than the sum of its proper divisors (184028707990).

245371610644 is a wasteful number, since it uses less digits than its factorization.

245371610644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61342902665 (or 61342902663 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 43.

The spelling of 245371610644 in words is "two hundred forty-five billion, three hundred seventy-one million, six hundred ten thousand, six hundred forty-four".