74803853057021 has 24 divisors (see below), whose sum is σ = 86694347291040. Its totient is φ = 63997737708800.

The previous prime is 74803853056979. The next prime is 74803853057029. The reversal of 74803853057021 is 12075035830847.

It is a de Polignac number, because none of the positive numbers 2^k-74803853057021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74803853057029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35793551 + ... + 37825731.

It is an arithmetic number, because the mean of its divisors is an integer number (3612264470460).

Almost surely, 2^{74803853057021} is an apocalyptic number.

It is an amenable number.

74803853057021 is a deficient number, since it is larger than the sum of its proper divisors (11890494234019).

74803853057021 is a wasteful number, since it uses less digits than its factorization.

74803853057021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043805 (or 2043788 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 53.

Adding to 74803853057021 its reverse (12075035830847), we get a palindrome (86878888887868).

The spelling of 74803853057021 in words is "seventy-four trillion, eight hundred three billion, eight hundred fifty-three million, fifty-seven thousand, twenty-one".