249440706990801 has 20 divisors (see below), whose sum is σ = 372628236749824. Its totient is φ = 166290710275800.

The previous prime is 249440706990793. The next prime is 249440706990803. The reversal of 249440706990801 is 108099607044942.

249440706990801 is a `hidden beast` number, since 2 + 4 + 9 + 4 + 407 + 0 + 69 + 90 + 80 + 1 = 666.

It is not a de Polignac number, because 249440706990801 - 2³ = 249440706990793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249440706990803) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24267745 + ... + 32981886.

Almost surely, 2^{249440706990801} is an apocalyptic number.

It is an amenable number.

249440706990801 is a deficient number, since it is larger than the sum of its proper divisors (123187529759023).

249440706990801 is an equidigital number, since it uses as much as digits as its factorization.

249440706990801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57303434 (or 57303425 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

Adding to 249440706990801 its sum of digits (63), we get a square (249440706990864 = 15793692²).

The spelling of 249440706990801 in words is "two hundred forty-nine trillion, four hundred forty billion, seven hundred six million, nine hundred ninety thousand, eight hundred one".