697597013845 has 4 divisors (see below), whose sum is σ = 837116416620. Its totient is φ = 558077611072.

The previous prime is 697597013819. The next prime is 697597013857. The reversal of 697597013845 is 548310795796.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 102414080484 + 595182933361 = 320022^2 + 771481^2 .

It is a cyclic number.

It is not a de Polignac number, because 697597013845 - 2³⁷ = 560158060373 is a prime.

It is a super-2 number, since 2×697597013845² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69759701380 + ... + 69759701389.

It is an arithmetic number, because the mean of its divisors is an integer number (209279104155).

Almost surely, 2^697597013845 is an apocalyptic number.

It is an amenable number.

697597013845 is a deficient number, since it is larger than the sum of its proper divisors (139519402775).

697597013845 is a wasteful number, since it uses less digits than its factorization.

697597013845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139519402774.

The product of its (nonzero) digits is 57153600, while the sum is 64.

The spelling of 697597013845 in words is "six hundred ninety-seven billion, five hundred ninety-seven million, thirteen thousand, eight hundred forty-five".