490794124821 has 48 divisors (see below), whose sum is σ = 894314207808. Its totient is φ = 235345824000.

The previous prime is 490794124819. The next prime is 490794124979. The reversal of 490794124821 is 128421497094.

It is not a de Polignac number, because 490794124821 - 2¹ = 490794124819 is a prime.

It is a super-2 number, since 2×490794124821² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490794124811) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11652880 + ... + 11694921.

It is an arithmetic number, because the mean of its divisors is an integer number (18631545996).

Almost surely, 2^490794124821 is an apocalyptic number.

It is an amenable number.

490794124821 is a deficient number, since it is larger than the sum of its proper divisors (403520082987).

490794124821 is a wasteful number, since it uses less digits than its factorization.

490794124821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23347842 (or 23347835 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 51.

The spelling of 490794124821 in words is "four hundred ninety billion, seven hundred ninety-four million, one hundred twenty-four thousand, eight hundred twenty-one".