154401225977 has 2 divisors, whose sum is σ = 154401225978. Its totient is φ = 154401225976.

The previous prime is 154401225973. The next prime is 154401226013. The reversal of 154401225977 is 779522104451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148968209296 + 5433016681 = 385964^2 + 73709^2 .

It is a cyclic number.

It is not a de Polignac number, because 154401225977 - 2² = 154401225973 is a prime.

It is not a weakly prime, because it can be changed into another prime (154401225971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77200612988 + 77200612989.

It is an arithmetic number, because the mean of its divisors is an integer number (77200612989).

Almost surely, 2^154401225977 is an apocalyptic number.

It is an amenable number.

154401225977 is a deficient number, since it is larger than the sum of its proper divisors (1).

154401225977 is an equidigital number, since it uses as much as digits as its factorization.

154401225977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 705600, while the sum is 47.

The spelling of 154401225977 in words is "one hundred fifty-four billion, four hundred one million, two hundred twenty-five thousand, nine hundred seventy-seven".