421825916737 has 2 divisors, whose sum is σ = 421825916738. Its totient is φ = 421825916736.

The previous prime is 421825916719. The next prime is 421825916767. The reversal of 421825916737 is 737619528124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 409093276816 + 12732639921 = 639604^2 + 112839^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421825916737 is a prime.

It is not a weakly prime, because it can be changed into another prime (421825916767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210912958368 + 210912958369.

It is an arithmetic number, because the mean of its divisors is an integer number (210912958369).

Almost surely, 2^421825916737 is an apocalyptic number.

It is an amenable number.

421825916737 is a deficient number, since it is larger than the sum of its proper divisors (1).

421825916737 is an equidigital number, since it uses as much as digits as its factorization.

421825916737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 55.

The spelling of 421825916737 in words is "four hundred twenty-one billion, eight hundred twenty-five million, nine hundred sixteen thousand, seven hundred thirty-seven".