241778545921 has 24 divisors (see below), whose sum is σ = 271896127272. Its totient is φ = 214755340800.

The previous prime is 241778545909. The next prime is 241778545927. The reversal of 241778545921 is 129545877142.

It can be written as a sum of positive squares in 4 ways, for example, as 76809351025 + 164969194896 = 277145^2 + 406164^2 .

It is not a de Polignac number, because 241778545921 - 2⁷ = 241778545793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (241778545927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1467315 + ... + 1623751.

It is an arithmetic number, because the mean of its divisors is an integer number (11329005303).

Almost surely, 2^241778545921 is an apocalyptic number.

It is an amenable number.

241778545921 is a deficient number, since it is larger than the sum of its proper divisors (30117581351).

241778545921 is a wasteful number, since it uses less digits than its factorization.

241778545921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156753 (or 156742 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 55.

The spelling of 241778545921 in words is "two hundred forty-one billion, seven hundred seventy-eight million, five hundred forty-five thousand, nine hundred twenty-one".