690352421380 has 12 divisors (see below), whose sum is σ = 1449740084940. Its totient is φ = 276140968544.

The previous prime is 690352421329. The next prime is 690352421383. The reversal of 690352421380 is 83124253096.

It can be written as a sum of positive squares in 2 ways, for example, as 171840095296 + 518512326084 = 414536^2 + 720078^2 .

It is a super-2 number, since 2×690352421380² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (690352421383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17258810515 + ... + 17258810554.

It is an arithmetic number, because the mean of its divisors is an integer number (120811673745).

Almost surely, 2^690352421380 is an apocalyptic number.

It is an amenable number.

690352421380 is an abundant number, since it is smaller than the sum of its proper divisors (759387663560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

690352421380 is a wasteful number, since it uses less digits than its factorization.

690352421380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34517621078 (or 34517621076 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 690352421380 in words is "six hundred ninety billion, three hundred fifty-two million, four hundred twenty-one thousand, three hundred eighty".