502040249891 has 4 divisors (see below), whose sum is σ = 510270417984. Its totient is φ = 493810081800.

The previous prime is 502040249869. The next prime is 502040249903. The reversal of 502040249891 is 198942040205.

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 502040249891 - 2³⁸ = 227162342947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (502040249801) 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, 4115083955 + ... + 4115084076.

It is an arithmetic number, because the mean of its divisors is an integer number (127567604496).

Almost surely, 2^502040249891 is an apocalyptic number.

502040249891 is a deficient number, since it is larger than the sum of its proper divisors (8230168093).

502040249891 is an equidigital number, since it uses as much as digits as its factorization.

502040249891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8230168092.

The product of its (nonzero) digits is 207360, while the sum is 44.

The spelling of 502040249891 in words is "five hundred two billion, forty million, two hundred forty-nine thousand, eight hundred ninety-one".