696505415761 has 3 divisors (see below), whose sum is σ = 696506250331. Its totient is φ = 696504581192.

The previous prime is 696505415737. The next prime is 696505415773. The reversal of 696505415761 is 167514505696.

It is a happy number.

The square root of 696505415761 is 834569.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 21150175761 + 675355240000 = 145431^2 + 821800^2 .

It is not a de Polignac number, because 696505415761 - 2³¹ = 694357932113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (696505415461) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 417285 + ... + 1251853.

Almost surely, 2^696505415761 is an apocalyptic number.

696505415761 is the 834569-th square number.

696505415761 is the 417285-th centered octagonal number.

It is an amenable number.

696505415761 is a deficient number, since it is larger than the sum of its proper divisors (834570).

696505415761 is an frugal number, since it uses more digits than its factorization.

696505415761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1669138 (or 834569 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 55.

The spelling of 696505415761 in words is "six hundred ninety-six billion, five hundred five million, four hundred fifteen thousand, seven hundred sixty-one".