690245171282 has 4 divisors (see below), whose sum is σ = 1035367756926. Its totient is φ = 345122585640.

The previous prime is 690245171281. The next prime is 690245171309. The reversal of 690245171282 is 282171542096.

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

It can be written as a sum of positive squares in only one way, i.e., 652138617601 + 38106553681 = 807551^2 + 195209^2 .

It is not an unprimeable number, because it can be changed into a prime (690245171281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172561292819 + ... + 172561292822.

Almost surely, 2^690245171282 is an apocalyptic number.

690245171282 is a deficient number, since it is larger than the sum of its proper divisors (345122585644).

690245171282 is a wasteful number, since it uses less digits than its factorization.

690245171282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345122585643.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 690245171282 in words is "six hundred ninety billion, two hundred forty-five million, one hundred seventy-one thousand, two hundred eighty-two".