1612542421634 has 4 divisors (see below), whose sum is σ = 2418813632454. Its totient is φ = 806271210816.

The previous prime is 1612542421631. The next prime is 1612542421657. The reversal of 1612542421634 is 4361242452161.

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., 1497894493225 + 114647928409 = 1223885^2 + 338597^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1612542421591 and 1612542421600.

It is not an unprimeable number, because it can be changed into a prime (1612542421631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403135605407 + ... + 403135605410.

Almost surely, 2^{1612542421634} is an apocalyptic number.

1612542421634 is a deficient number, since it is larger than the sum of its proper divisors (806271210820).

1612542421634 is an equidigital number, since it uses as much as digits as its factorization.

1612542421634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806271210819.

The product of its digits is 276480, while the sum is 41.

Adding to 1612542421634 its reverse (4361242452161), we get a palindrome (5973784873795).

The spelling of 1612542421634 in words is "one trillion, six hundred twelve billion, five hundred forty-two million, four hundred twenty-one thousand, six hundred thirty-four".