245921205892 has 24 divisors (see below), whose sum is σ = 432388591544. Its totient is φ = 122382876672.

The previous prime is 245921205883. The next prime is 245921205911. The reversal of 245921205892 is 298502129542.

It can be written as a sum of positive squares in 4 ways, for example, as 35851150336 + 210070055556 = 189344^2 + 458334^2 .

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, 619708 + ... + 935884.

Almost surely, 2^245921205892 is an apocalyptic number.

It is an amenable number.

245921205892 is a deficient number, since it is larger than the sum of its proper divisors (186467385652).

245921205892 is a wasteful number, since it uses less digits than its factorization.

245921205892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317095 (or 317093 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 49.

The spelling of 245921205892 in words is "two hundred forty-five billion, nine hundred twenty-one million, two hundred five thousand, eight hundred ninety-two".