815348006740 has 12 divisors (see below), whose sum is σ = 1712230814196. Its totient is φ = 326139202688.

The previous prime is 815348006731. The next prime is 815348006741. The reversal of 815348006740 is 47600843518.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 107239220676 + 708108786064 = 327474^2 + 841492^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815348006741) 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, 20383700149 + ... + 20383700188.

It is an arithmetic number, because the mean of its divisors is an integer number (142685901183).

Almost surely, 2^815348006740 is an apocalyptic number.

It is an amenable number.

815348006740 is an abundant number, since it is smaller than the sum of its proper divisors (896882807456).

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

815348006740 is a wasteful number, since it uses less digits than its factorization.

815348006740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40767400346 (or 40767400344 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 46.

The spelling of 815348006740 in words is "eight hundred fifteen billion, three hundred forty-eight million, six thousand, seven hundred forty".