240955361981 has 4 divisors (see below), whose sum is σ = 241825237212. Its totient is φ = 240085486752.

The previous prime is 240955361971. The next prime is 240955361989. The reversal of 240955361981 is 189163559042.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 189163559042 = 2 ⋅94581779521.

It can be written as a sum of positive squares in 2 ways, for example, as 60550444900 + 180404917081 = 246070^2 + 424741^2 .

It is a cyclic number.

It is not a de Polignac number, because 240955361981 - 2⁶ = 240955361917 is a prime.

It is a super-2 number, since 2×240955361981² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240955361989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434937200 + ... + 434937753.

It is an arithmetic number, because the mean of its divisors is an integer number (60456309303).

Almost surely, 2^240955361981 is an apocalyptic number.

It is an amenable number.

240955361981 is a deficient number, since it is larger than the sum of its proper divisors (869875231).

240955361981 is an equidigital number, since it uses as much as digits as its factorization.

240955361981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869875230.

The product of its (nonzero) digits is 2332800, while the sum is 53.

The spelling of 240955361981 in words is "two hundred forty billion, nine hundred fifty-five million, three hundred sixty-one thousand, nine hundred eighty-one".