815765620450 has 192 divisors, whose sum is σ = 1725302073600. Its totient is φ = 284387328000.

The previous prime is 815765620429. The next prime is 815765620451. The reversal of 815765620450 is 54026567518.

It is a junction number, because it is equal to n+sod(n) for n = 815765620394 and 815765620403.

It is not an unprimeable number, because it can be changed into a prime (815765620451) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 325913899 + ... + 325916401.

It is an arithmetic number, because the mean of its divisors is an integer number (8985948300).

Almost surely, 2^815765620450 is an apocalyptic number.

815765620450 is an abundant number, since it is smaller than the sum of its proper divisors (909536453150).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

815765620450 is a wasteful number, since it uses less digits than its factorization.

815765620450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813 (or 2808 counting only the distinct ones).

The product of its (nonzero) digits is 2016000, while the sum is 49.

The spelling of 815765620450 in words is "eight hundred fifteen billion, seven hundred sixty-five million, six hundred twenty thousand, four hundred fifty".