424721984778 has 384 divisors, whose sum is σ = 1202607544320. Its totient is φ = 105318420480.

The previous prime is 424721984777. The next prime is 424721984779. The reversal of 424721984778 is 877489127424.

424721984778 is a `hidden beast` number, since 4 + 2 + 4 + 72 + 1 + 98 + 477 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (424721984777) and next prime (424721984779).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (424721984777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 627358576 + ... + 627359252.

It is an arithmetic number, because the mean of its divisors is an integer number (3131790480).

Almost surely, 2^424721984778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 424721984778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (601303772160).

424721984778 is an abundant number, since it is smaller than the sum of its proper divisors (777885559542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

424721984778 is a wasteful number, since it uses less digits than its factorization.

424721984778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062 (or 1059 counting only the distinct ones).

The product of its digits is 50577408, while the sum is 63.

The spelling of 424721984778 in words is "four hundred twenty-four billion, seven hundred twenty-one million, nine hundred eighty-four thousand, seven hundred seventy-eight".