690032878322 has 6 divisors (see below), whose sum is σ = 1035051079629. Its totient is φ = 345015851780.

The previous prime is 690032878319. The next prime is 690032878349. The reversal of 690032878322 is 223878230096.

It can be written as a sum of positive squares in 2 ways, for example, as 389914073761 + 300118804561 = 624431^2 + 547831^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=587381.

It is a super-2 number, since 2×690032878322² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 881072 + ... + 1468452.

Almost surely, 2^690032878322 is an apocalyptic number.

690032878322 is a deficient number, since it is larger than the sum of its proper divisors (345018201307).

690032878322 is an frugal number, since it uses more digits than its factorization.

690032878322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174764 (or 587383 counting only the distinct ones).

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

Multiplying 690032878322 by its sum of digits (50), we get a square (34501643916100 = 5873810²).

The spelling of 690032878322 in words is "six hundred ninety billion, thirty-two million, eight hundred seventy-eight thousand, three hundred twenty-two".