421773787625 has 16 divisors (see below), whose sum is σ = 537573134592. Its totient is φ = 330239897200.

The previous prime is 421773787579. The next prime is 421773787649. The reversal of 421773787625 is 526787377124.

It is not a de Polignac number, because 421773787625 - 2¹⁰ = 421773786601 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 35889767 + ... + 35901516.

It is an arithmetic number, because the mean of its divisors is an integer number (33598320912).

Almost surely, 2^421773787625 is an apocalyptic number.

It is an amenable number.

421773787625 is a deficient number, since it is larger than the sum of its proper divisors (115799346967).

421773787625 is an equidigital number, since it uses as much as digits as its factorization.

421773787625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71791345 (or 71791335 counting only the distinct ones).

The product of its digits is 27659520, while the sum is 59.

The spelling of 421773787625 in words is "four hundred twenty-one billion, seven hundred seventy-three million, seven hundred eighty-seven thousand, six hundred twenty-five".