697216386490 has 32 divisors (see below), whose sum is σ = 1363926508560. Its totient is φ = 255071960064.

The previous prime is 697216386457. The next prime is 697216386497. The reversal of 697216386490 is 94683612796.

697216386490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 164510548801 + 532705837689 = 405599^2 + 729867^2 .

It is a super-2 number, since 2×697216386490² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (697216386497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24587679 + ... + 24616018.

Almost surely, 2^697216386490 is an apocalyptic number.

697216386490 is a deficient number, since it is larger than the sum of its proper divisors (666710122070).

697216386490 is a wasteful number, since it uses less digits than its factorization.

697216386490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49203826.

The product of its (nonzero) digits is 23514624, while the sum is 61.

The spelling of 697216386490 in words is "six hundred ninety-seven billion, two hundred sixteen million, three hundred eighty-six thousand, four hundred ninety".