154113434541421 has 2 divisors, whose sum is σ = 154113434541422. Its totient is φ = 154113434541420.

The previous prime is 154113434541397. The next prime is 154113434541433. The reversal of 154113434541421 is 124145434311451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103097928301225 + 51015506240196 = 10153715^2 + 7142514^2 .

It is a cyclic number.

It is not a de Polignac number, because 154113434541421 - 2³³ = 154104844606829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154113434541221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77056717270710 + 77056717270711.

It is an arithmetic number, because the mean of its divisors is an integer number (77056717270711).

Almost surely, 2^{154113434541421} is an apocalyptic number.

It is an amenable number.

154113434541421 is a deficient number, since it is larger than the sum of its proper divisors (1).

154113434541421 is an equidigital number, since it uses as much as digits as its factorization.

154113434541421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 460800, while the sum is 43.

Adding to 154113434541421 its reverse (124145434311451), we get a palindrome (278258868852872).

The spelling of 154113434541421 in words is "one hundred fifty-four trillion, one hundred thirteen billion, four hundred thirty-four million, five hundred forty-one thousand, four hundred twenty-one".