816248951409 has 16 divisors (see below), whose sum is σ = 1094600340288. Its totient is φ = 541040181312.

The previous prime is 816248951393. The next prime is 816248951429. The reversal of 816248951409 is 904159842618.

It is not a de Polignac number, because 816248951409 - 2⁴ = 816248951393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (816248951429) 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 15 ways as a sum of consecutive naturals, for example, 663582 + ... + 1439735.

It is an arithmetic number, because the mean of its divisors is an integer number (68412521268).

Almost surely, 2^816248951409 is an apocalyptic number.

It is an amenable number.

816248951409 is a deficient number, since it is larger than the sum of its proper divisors (278351388879).

816248951409 is a wasteful number, since it uses less digits than its factorization.

816248951409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2104064.

The product of its (nonzero) digits is 4976640, while the sum is 57.

The spelling of 816248951409 in words is "eight hundred sixteen billion, two hundred forty-eight million, nine hundred fifty-one thousand, four hundred nine".