1642421547764 has 48 divisors (see below), whose sum is σ = 3120251904000. Its totient is φ = 753912756576.

The previous prime is 1642421547761. The next prime is 1642421547773. The reversal of 1642421547764 is 4677451242461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1642421547761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1563614 + ... + 2393685.

It is an arithmetic number, because the mean of its divisors is an integer number (65005248000).

Almost surely, 2^{1642421547764} is an apocalyptic number.

It is an amenable number.

1642421547764 is a deficient number, since it is larger than the sum of its proper divisors (1477830356236).

1642421547764 is a wasteful number, since it uses less digits than its factorization.

1642421547764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3957492 (or 3957490 counting only the distinct ones).

The product of its digits is 9031680, while the sum is 53.

The spelling of 1642421547764 in words is "one trillion, six hundred forty-two billion, four hundred twenty-one million, five hundred forty-seven thousand, seven hundred sixty-four".