1642126421603 has 4 divisors (see below), whose sum is σ = 1738722093480. Its totient is φ = 1545530749728.

The previous prime is 1642126421587. The next prime is 1642126421641. The reversal of 1642126421603 is 3061246212461.

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

It is a cyclic number.

It is not a de Polignac number, because 1642126421603 - 2⁴ = 1642126421587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1642126411603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48297835913 + ... + 48297835946.

It is an arithmetic number, because the mean of its divisors is an integer number (434680523370).

Almost surely, 2^{1642126421603} is an apocalyptic number.

1642126421603 is a deficient number, since it is larger than the sum of its proper divisors (96595671877).

1642126421603 is an equidigital number, since it uses as much as digits as its factorization.

1642126421603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96595671876.

The product of its (nonzero) digits is 82944, while the sum is 38.

The spelling of 1642126421603 in words is "one trillion, six hundred forty-two billion, one hundred twenty-six million, four hundred twenty-one thousand, six hundred three".