1623632043434 has 4 divisors (see below), whose sum is σ = 2435448065154. Its totient is φ = 811816021716.

The previous prime is 1623632043431. The next prime is 1623632043491. The reversal of 1623632043434 is 4343402363261.

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

It can be written as a sum of positive squares in only one way, i.e., 1622095168225 + 1536875209 = 1273615^2 + 39203^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1623632043391 and 1623632043400.

It is not an unprimeable number, because it can be changed into a prime (1623632043431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405908010857 + ... + 405908010860.

Almost surely, 2^{1623632043434} is an apocalyptic number.

1623632043434 is a deficient number, since it is larger than the sum of its proper divisors (811816021720).

1623632043434 is an equidigital number, since it uses as much as digits as its factorization.

1623632043434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811816021719.

The product of its (nonzero) digits is 746496, while the sum is 41.

The spelling of 1623632043434 in words is "one trillion, six hundred twenty-three billion, six hundred thirty-two million, forty-three thousand, four hundred thirty-four".