816225425101 has 4 divisors (see below), whose sum is σ = 830059754400. Its totient is φ = 802391095804.

The previous prime is 816225425069. The next prime is 816225425123. The reversal of 816225425101 is 101524522618.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 816225425101 - 2⁵ = 816225425069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816225425131) 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, 6917164561 + ... + 6917164678.

It is an arithmetic number, because the mean of its divisors is an integer number (207514938600).

Almost surely, 2^816225425101 is an apocalyptic number.

It is an amenable number.

816225425101 is a deficient number, since it is larger than the sum of its proper divisors (13834329299).

816225425101 is a wasteful number, since it uses less digits than its factorization.

816225425101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13834329298.

The product of its (nonzero) digits is 38400, while the sum is 37.

Adding to 816225425101 its reverse (101524522618), we get a palindrome (917749947719).

The spelling of 816225425101 in words is "eight hundred sixteen billion, two hundred twenty-five million, four hundred twenty-five thousand, one hundred one".