816248651949 has 24 divisors (see below), whose sum is σ = 1213215819192. Its totient is φ = 528442237440.

The previous prime is 816248651941. The next prime is 816248651951. The reversal of 816248651949 is 949156842618.

816248651949 is a `hidden beast` number, since 8 + 1 + 62 + 486 + 5 + 1 + 94 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 287564062500 + 528684589449 = 536250^2 + 727107^2 .

It is not a de Polignac number, because 816248651949 - 2³ = 816248651941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816248651941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2178904 + ... + 2525889.

It is an arithmetic number, because the mean of its divisors is an integer number (50550659133).

Almost surely, 2^816248651949 is an apocalyptic number.

It is an amenable number.

816248651949 is a deficient number, since it is larger than the sum of its proper divisors (396967167243).

816248651949 is a wasteful number, since it uses less digits than its factorization.

816248651949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4705357 (or 4705354 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 63.

The spelling of 816248651949 in words is "eight hundred sixteen billion, two hundred forty-eight million, six hundred fifty-one thousand, nine hundred forty-nine".