690261783242 has 8 divisors (see below), whose sum is σ = 1035408616932. Its totient is φ = 345125577600.

The previous prime is 690261783229. The next prime is 690261783251. The reversal of 690261783242 is 242387162096.

It can be written as a sum of positive squares in 2 ways, for example, as 509254931641 + 181006851601 = 713621^2 + 425449^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×690261783242² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2492609 + ... + 2755652.

Almost surely, 2^690261783242 is an apocalyptic number.

690261783242 is a deficient number, since it is larger than the sum of its proper divisors (345146833690).

690261783242 is a wasteful number, since it uses less digits than its factorization.

690261783242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5314024.

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 690261783242 in words is "six hundred ninety billion, two hundred sixty-one million, seven hundred eighty-three thousand, two hundred forty-two".