154721768041 has 4 divisors (see below), whose sum is σ = 163823048532. Its totient is φ = 145620487552.

The previous prime is 154721768011. The next prime is 154721768053. The reversal of 154721768041 is 140867127451.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 82156183641 + 72565584400 = 286629^2 + 269380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154721768041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 154721767982 and 154721768000.

It is not an unprimeable number, because it can be changed into a prime (154721768011) 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, 4550640220 + ... + 4550640253.

It is an arithmetic number, because the mean of its divisors is an integer number (40955762133).

Almost surely, 2^154721768041 is an apocalyptic number.

It is an amenable number.

154721768041 is a deficient number, since it is larger than the sum of its proper divisors (9101280491).

154721768041 is an equidigital number, since it uses as much as digits as its factorization.

154721768041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9101280490.

The product of its (nonzero) digits is 376320, while the sum is 46.

The spelling of 154721768041 in words is "one hundred fifty-four billion, seven hundred twenty-one million, seven hundred sixty-eight thousand, forty-one".