155421453434 has 8 divisors (see below), whose sum is σ = 251065424820. Its totient is φ = 71732978496.

The previous prime is 155421453389. The next prime is 155421453449. The reversal of 155421453434 is 434354124551.

It can be written as a sum of positive squares in 2 ways, for example, as 116967420025 + 38454033409 = 342005^2 + 196097^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 155421453391 and 155421453400.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2988874079 + ... + 2988874130.

Almost surely, 2^155421453434 is an apocalyptic number.

155421453434 is a deficient number, since it is larger than the sum of its proper divisors (95643971386).

155421453434 is a wasteful number, since it uses less digits than its factorization.

155421453434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5977748224.

The product of its digits is 576000, while the sum is 41.

Adding to 155421453434 its reverse (434354124551), we get a palindrome (589775577985).

The spelling of 155421453434 in words is "one hundred fifty-five billion, four hundred twenty-one million, four hundred fifty-three thousand, four hundred thirty-four".