154561456393 has 2 divisors, whose sum is σ = 154561456394. Its totient is φ = 154561456392.

The previous prime is 154561456331. The next prime is 154561456453. The reversal of 154561456393 is 393654165451.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106894340809 + 47667115584 = 326947^2 + 218328^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-154561456393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 154561456393.

It is not a weakly prime, because it can be changed into another prime (154561456193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77280728196 + 77280728197.

It is an arithmetic number, because the mean of its divisors is an integer number (77280728197).

Almost surely, 2^154561456393 is an apocalyptic number.

It is an amenable number.

154561456393 is a deficient number, since it is larger than the sum of its proper divisors (1).

154561456393 is an equidigital number, since it uses as much as digits as its factorization.

154561456393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832000, while the sum is 52.

The spelling of 154561456393 in words is "one hundred fifty-four billion, five hundred sixty-one million, four hundred fifty-six thousand, three hundred ninety-three".