7813725785 has 16 divisors (see below), whose sum is σ = 9437881104. Its totient is φ = 6210097152.

The previous prime is 7813725727. The next prime is 7813725797. The reversal of 7813725785 is 5875273187.

It can be written as a sum of positive squares in 8 ways, for example, as 41011216 + 7772714569 = 6404^2 + 88163^2 .

It is a cyclic number.

It is not a de Polignac number, because 7813725785 - 2¹⁴ = 7813709401 is a prime.

It is a super-2 number, since 2×7813725785² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1513769 + ... + 1518921.

It is an arithmetic number, because the mean of its divisors is an integer number (589867569).

Almost surely, 2^7813725785 is an apocalyptic number.

It is an amenable number.

7813725785 is a deficient number, since it is larger than the sum of its proper divisors (1624155319).

7813725785 is a wasteful number, since it uses less digits than its factorization.

7813725785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7084.

The product of its digits is 3292800, while the sum is 53.

The square root of 7813725785 is about 88395.2814634356. The cubic root of 7813725785 is about 1984.3550861944.

The spelling of 7813725785 in words is "seven billion, eight hundred thirteen million, seven hundred twenty-five thousand, seven hundred eighty-five".