240155863249 has 3 divisors (see below), whose sum is σ = 240156353307. Its totient is φ = 240155373192.

The previous prime is 240155863231. The next prime is 240155863273. The reversal of 240155863249 is 942368551042.

The square root of 240155863249 is 490057.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 198608379025 + 41547484224 = 445655^2 + 203832^2 .

It is not a de Polignac number, because 240155863249 - 2²⁹ = 239618992337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (240155863349) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 245029 + ... + 735085.

It is an arithmetic number, because the mean of its divisors is an integer number (80052117769).

Almost surely, 2^240155863249 is an apocalyptic number.

240155863249 is the 490057-th square number.

240155863249 is the 245029-th centered octagonal number.

It is an amenable number.

240155863249 is a deficient number, since it is larger than the sum of its proper divisors (490058).

240155863249 is an frugal number, since it uses more digits than its factorization.

240155863249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 980114 (or 490057 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 49.

Multiplying 240155863249 by its sum of digits (49), we get a square (11767637299201 = 3430399²).

The spelling of 240155863249 in words is "two hundred forty billion, one hundred fifty-five million, eight hundred sixty-three thousand, two hundred forty-nine".